Best Portable Function Generators in 2026

【Safe & Stable Power Supply】：EBL portable power station is equipped with 300Wh lithium-ion battery pack, which contains upgraded chip, supports fast charging function and more than 1000 recycling times. Pure Sine Wave technology AC outlets deliver stable and safe power, without damage and reduces audible and electrical noise.

【Portable Power Station】: It is only 3.3KG with portable size. You can easily pick it up with one hand by the Non-slip handle. Charge your EBL Power Station through the wall outlet in home, or through the car outlet during a road trip, even through solar panel during outside holiday.

【Up to 9 Simultaneous Devices】: Featuring 3* DC outlet, 3* fast charge 3.0 port, 1* AC outlet, 1* PD 60W USB-C port and 1*Wireless Charging for phone. Also including SOS LED bright light. It can meet all you meets and power your smartphone, tablet, laptop, camera, light, drones, fans, in-car appliances, CPAP machine anytime anywhere.

【High Capacity 500Wh 】AC50S Rechargeable Lithium Solar Generator, 500Wh (45Ah, 11.1V) with 2* 120V AC-Outlet(Pure Sine-wave) can Charge Small Appliance(Max.300W) Such as Smartphones 36 Times, Laptops(45W) 9 times, Gopro 80 times, Drone, Mini Projector, Mini Car Fridge and Others. The Portable Power Station is an Ideal Emergency Power Backup for RV Outdoors, Camping or Hurricane and Other Power Outage Situations.

【Four Ways to Recharge 】AC/Solar/Car Recharge//Generator: 6-6.5Hrs to Full Recharge the Power Station from a Wall Outlet (90W AC Adapter Included); 5.5-6Hrs to Recharge it Fully by SP120 120W Solar Panel (Not Include, MPPT Charge Mode); 5Hrs/2.5 Hrs from 12V/24V car,Holdable Handle Design is Perfect for Outdoor Adventure and Camping.

【Regulated DC12V /Wireless Charging / Faster Charge PD 45W USB-C】: Flexible Charge Options can Make Your Life More Convenient. PD 45W is a More Faster Charge Mode for your Laptop/Phone,you can Charge Several Devices via AC/Wireless/DC/USB-C/USB-A Output Ports, Save your Valuable Time.

POWERFUL AND PORTABLE: Designed with a portable shape, built-in 296Wh lithium battery pack and 600W AC output (750W PEAK), SinKeu portable power station can provide enough and stable power to charge your phones laptop cpap camera etc.

POWER ON THE GO& MULTIPORT: Equipped with 2* pure sine wave AC outlets, 2* Regulated DC ports, 2* USB-C ports, 1* QC3.0 port, 1* USB port and 1*car port. SinKeu portable power station can recharge itself and charge 9 devices at the same time.

SPEED UP YOUR RECHARGE: It takes only 2 hours to recharge 60-80% and 3.5 hours to full charge with the fast charging function. you can charge it with an AC adapater at home, through the car outlet during a road trip, or use a solar panel between 13-25V voltge.

☼【Designed For Mobility】The multi-interface output camping power stations support fast charging function for laptop, cell phones, iPad, Switch, camera, LED light, speakers, camping fan etc. Also serves as an emergency charging station for camping supplies within 80W such as drones, CPAP machine, 12 volt refrigerator, camping air conditioner, etc. (Solar Panel Not Included)

☼【Versatile Power Source】Armed with a 22500mAh rechargeable battery pack, camping generator features 1x 110V/80W(Peak 120W) AC outlets, 2x USB port(18W QC3.0) and 1x USB C port(PD 30W) that deliver stable and secure power as you expect. It's a great choice for car tent, mobile office, hurricane emergency supplies, RV camping accessories, road trip must haves, home appliances

☼【Flashlights For Camping】LED light of camping power supply provides 4 different levels of brightness and SOS mode. Camping lights can last up to 94 hours, 13 hours and 30 hours in power saving, super bright and SOS modes respectively. Perfectly suit outdoor adventures, hiking, fishing, power outage, emergency situations, truck bed tent, reading, etc.

【SuperSafe LIFEBMS Power Station】VTOMAN Jump 1500X battery power station is built-in a super safe LIFEBMS battery management system by Vtoman, it provides up to 10 battery protections for safe charging, including Over-Charge Protection, Over-Discharge Protection, Over-Voltage Protection, Over-Current Protection, etc. Also thanks to the built-in LiFePO4(LFP) battery, Vtoman Jump1500X is more heat-resistant and safer compared with other NCM batteries.

【Capacity Expandable to 2376Wh】VTOMAN Jump1500X portable power generator has a large capacity of 828Wh, and the capacity can be expanded from 828Wh to 2376Wh with VTOMAN Jump 1500 Extra Battery (Sold separately) to provide you more juice for daily power needs. Besides, the built-in premium LiFePO4 battery features 3,000 cycles of lifespan before down to 80% of its original capacity, which can satisfy both your daily needs and long-term use purpose.

【1500W Constant-Power Power Station】VTOMAN Jump 1500X power station is rated to provide a pure sine wave 1500W load capacity(Surge 3000W). In addition to being able to power devices below rated 1500 watts like most power stations do, Jump 1500X will also output 1500W constant-power when powering over 1500W appliances instead of turning off its output. It provides you an alternative emergency solution when powering appliances over 1500W, such as water heaters, space heaters, ovens, etc.

【Powerful Engine】5000 Rated Watts and 5500 Peak Watts at Less Than 3% THD，Telescoping Handle ，Manual / Electric start， 3.9 Gallon Fuel Tank With Fuel Gauge，Up to 10 Hours of Run Time with 120/240V Volt Selector Switch.

【Wide Application】 GENMAX portable generator is great for home emergency power supply，campgrounds, construction sites, mobile devices and power outages. This generator is very durable that provides continuous power to handle multiple jobs, such as powering high voltage appliances and heavy duty power tools in different job sites.

【Multifunctional power supply panel】Includes low oil alarm, overload alarm,Co warning light ，output indicator features and Fault alarm function，“Eco mode” for conserving energy and maximum fuel efficiency，An easily accessible TT-30R RV outlet makes the perfect for travel trailers.

🔋【Safer & Ultra-durable】CTECHi 300W portable power station uses automotive-grade LiFePO4 battery cells for excellent thermal stability and safety. The cycles of this backup power supply could be up to 3000 times, 6 times the lifespan of a lithium battery. The Pure Sine Wave of the 110V AC output couldn’t do harm to your home appliances with precise frequencies such as computers.

🔋【All the Ports You Need】Featuring 2 AC ports, 2 USB-A ports, 1 USB-C port (input/output supported), and a car outlet, this LiFePO4 power station can charge up to 6 devices at the same time. Quick Charge 3.0 and USB PD (45W) could help charging in a short time during camping, RV’s, hunting and office working.

🔋【Small Size with Large Capacity】With weight of 4.3kg, this backup battery power supply is easy to carry when walking. Providing up to 300W continuous power and 600W surge power and a capacity of 299Wh, this portable outlet power supply could support a variety of devices and terminals, especially when there’s a power outage.

【HIGH CAPACITY & PORTABLE POWER STATION】Apowking ac power bank 296Wh (80,000mAh) can power plenty of your devices, such as phone, laptop, tablet, Macbook, light, fan, TV, projector, small blender, car refrigerator, drone, switch, camera and CPAP machine with rated power less than 500 watts. NOTE: 500W is the output power, NOT the battery capacity. It is recommend that CPAP users use DC converter to work with this portable battery pack for better effect.

【MULTI FUNCTION OUTPUTS】This portable laptop charger is equipped with 2*pure sine wave AC output ports (110V/500W), 4*QC USB (5V/2.4A, max 12W) and 1*DC vehicle output port (12-16V/10A max) to power different devices according to your needs. What's more, the built-in cooling fan will auto cool down the unit when the working temperature rises too high after a long time use. Please turn off the AC output when not in use to save the battery power.

【FAST CHARGING & 3 WAYS TO RECHARGE】When recharged by a solar panel (DC 13-23V, 40-120W, solar panel NOT included) under direct sunlight, it becomes a solar powered generator to provide eco-friendly green power. You can also recharge it with AC wall outlet at home or car outlet in your car. Besides, it supports 15V/9A Max fast charging when you press the fast charge button next to the solar input port, which will charge quicker and take shorter time than normal recharging.

Compatible with Makita: Fits for all Makita 18V max lithium batteries, turning your Makita battery into a small generator (Battery is NOT included)

Powerful Charging: The DC to AC output voltage of this power inverter is 110v ~ 120v. Equipped with a 5V 3.1A USB-A port and a PD 20W 5V 3A Type-C port, you can quickly charge up to three devices simultaneously. Great for phones, tablets, laptops, radios, small fans, led lights and so on

Compact LED Nightlight: Featuring a 450LM LED work light, with its compact size (4 x 3 x 4in) and lightweight 0.7LB, this portable battery inverter is a great gadget for outdoor power solution and outdoor camping light, and you can store it anywhere

✹MULTI-PURPOSE SOLAR GENERATOR:This portable power station has built-in LED flashlights and 3 LED lamps with individual switch&3m cable which brings light with low power consumption.Equipped with DC/USB outlets, used for charging small-capacity devices such as mobile phones, e-books, game consoles, digital cameras, MP4, etc.

✹10000mAh Portable Generator: This solar power station with 10W solar panel,supply power to LED lights and mobile phone. Ideal portable generator for home and outdoor use.

✹2 CHARGING WAYS :Our outdoor generator provides 2 charging ways. 10W solar panel charging : about 8-15 hrs to fully charge in full sun. AC charging : suits for wall plug about 10 hours to fully charge.

Specifications : Max power 20W, Rotating speed: 2000rmp/min, Size 179*92*84 mm, Material metal generator body, Color Blue;

Voltage/Current: 3V/6.6A, 5V/4A,6V/3.3A, 9V/2.2A,12V/1.6A, 15V/1.3A(The current is an unloaded current, which is connected to different products, and the load current will change after charging;);

100% brand new and high quality. Package Includes: 1 x Crank Generator , 1 x Instructions

【Upgraded Signal Stability】Seesii Dual-channel DDS arbitrary waveform generator adopts large scale FPGA integrated circuit and high speed MCU microprocessor. The internal circuit adopts active crystal oscillator as benchmark. So the signal stability is greatly strengthened.

【Storage And Custom】 You can store 99 groups instrument state parameters set by the user, can be called up to Reproduce. Frequency output of Sine wave can be up to 60MHz. 200MSa/s sampling rate. It has 60 positions for saving user-defined waveform. In addition, it has a very good software package that allows you to create your own waves and frequency combinations. After you save them, you can disconnect the unit from the computer and use them for any applications you wish.

【High Precise】 Using Dual-channel DDS signal and TTL electric level output to generate precise, stable, low distortion output signal. includes Sine wave, Square wave, Triangle wave, Sawtooth wave, Pulse wave, white noise, user-defined waveform etc. each channel can be independently set the parameters.Duty cycle of each channel can be adjusted separately. Precision can be 0.1%.

🚀【Portable Power Inverter】The power inverter has a 150V household socket, 2 USB ports, 1 light. *Input voltage: DC 18V | Output voltage: AC 110V~120V | USB output: DC 5V/2.4A | LED light: 200lm. (US plug)

🚀【Compatible with Ryobi 18V Battery】Suitable for Ryobi 18V lithium battery and 18V nickel battery, DC to AC charger.

🚀【Reliable wireless power】Charge your laptops, tablets, cellphones, kindles, game consoles, lights, speakers, TVs, cameras, drones, and more. Not compatible with products over 200W such as, most power tools, fridges, coffee pots, microwaves, etc. Perfect for home or travel. Phone-size design is ideal for work, jobsites, camping, tailgating, vacations, home emergency backup power, and wherever outlets are scarce.

🚗【Powerful Capacity & Wide Application】With large capacity of 560Wh(156000mAh) and 500W AC output (peak 1000W), ALLWEI portable power station can power your devices for hours at the same time for laptop, phone, fan, drone, camera, CPAP, TV, etc. The solar generator is suitable for outdoor activities, home backup and emergency usage.

🚗【Upgraded USB-C PD100W】ALLWEI generators for home use updates USB-C output to PD100W, featured with CHARGE and DISCHARGE dual function. Fast charging for your travel necessary devices like phone and camera, enjoy your journey all the day. Recharge the portable battery pack with USB-C port and AC wall socket, fully charged in 2.5 hours, save your time.

🚗【8 Versatile Outlets】The portable generator can power up to 8 devices simultaneously. This home battery backup is equipped with 2* AC outputs(110V/500W), 1* USB-C 100W PD for superfast charging, 2* USB-A Quick Charge 3.0 ports (18W max), 2*DC ports (13.8V/3A), 1*Car Port (13.8V/10A). Fast charge for your essential devices and appliances.

⚡【296Wh 3.7V / 80,000mAh】(Pls note that you can download the user manual in product page) Most 300W power station is less than 296Wh 80000mAh, they are about 60000mAh. Which means Geartist XG300 can work for longer time. How to know the standby time? For example: If your CPAP is 50W, it can work 296Wh/50W=5.92 hours; If your CAPA is 80W, it can work about 4 hours. It is a emergency power station, can’t work as a wall outlet.

⚡【Charge 8 Devices meanwhile】Geartist XG300 has 8 various power outputs - 2x Pure Sine Wave AC outlets (110V Rated 300W, Peak 500W), 2x DC ports, 2x USB ports , 1x QC3.0 quick charge port, and 1x USB Type-C PD18W port. It is a perfect backup power for USA people when hurricane/snowstorm/earthquake/tornadoes comes.

⚡【3 CHARGING MODES】1. AC wall outlet (6~7 hours fully charged), 2. Car cigarette lighter for emergency, 3. Any compatible solar panel (suggest 80w solar panel or above for emergency), Solar panel is not included.

【288Wh CAPACITY & 300W POWER】Apollo-P 300 is equipped with a 288Wh lithium-ion battery pack, and has a pure sine wave AC power outlet, which can provide a stable and safe 300W (600W surge) power supply. It is also equipped with an automatic cooling system with temperature control to ensure normal operation when you use it. Ideal for use in outdoor off-grid scenarios, it is the best choice for outdoor enthusiasts. Support solar panel recharging.

【POWER 9 DEVICES AT SAME TIME】This Backup Power Supply can power up to 9 devices simultaneously. 1 * AC Outlet(Pure Sine Wave 300W/110V 600W Surge), 2 * DC Outlet(12V/10A and 24V/4A, Regulated output), 2 * Universal USB(5V/2A), 1 * USB3.0(5V-9V/2A 18W), 1 * Type-C(5V-9V/2A 18W), 1 * Car Output(12V/10A 120W), 1 * Wireless Charging(5W). It’s ideal for situations like traveling, camping, party, RV, home blackout or emergency where you need more power for devices.

【SUPER PRACTICAL DESIGN】1. Pure sine wave AC outlet and stable 12V/24V DC outlet, it can charge your devices more stably. 2. Charge and power simultaneously, can power your devices while recharging from solar panels or wall sockets. 3. Built-in MPPT, which ensures a better PV recharging rates and speeds up the battery recharge. 4. LED display, shows the electric quantity and the input/output power, allowing you to more visualize the status of the device. 5. Built-in flashlight function.

【Powerful Solar Generator】 Combine the Vita 550 and 1 200 watts foldable solar panel into one kit. This solar generator provides 538Wh capacity electric power and up to 3 AC outputs to keep your power-hungry camping devices working until the end of the trip.

【Clean & Renewable Solar Charging Way】With the 200W solar panel, you'll always be ready for off-grid. VITA 550 can be easily chained to solar panels - all while requiring no additional fuel as the gas generator, providing a cost-effective solution for you.

【Safe & Reliable LiFePO4 Battery】With long-lasting LFP batteries, VITA 550 power station is durable for over 3000 cycles of charges and discharges. In comparison to the industry average of 3 to 5 years, it has an impressive lifespan of around 8 to 10 years.

🌟LARGE CAPACITY BATTERY PACKS: HP300T 288Wh 80,000mAh high quality lithium batteries, pure sine wave AC outlet, power station, portable power supply, solar generator, home emergency backup power. It doesn’t only power music player, smartphones, tablets, camera, car refrigerator, car wash, car vacuum… but also can power projector, printer, GPS, drone, laptop, computer, CPAP machine, fan, TV, holiday lights…

🌟MULTI-FUNCTION OUTPUTS: HP300T portable generator has high efficient and multi-function power outputs to meet different power requirements for family trips, outings, camping, or wherever you may need electricity. 【1】2* 110V/60Hz pure sine wave AC outlet; 【2】2* QC 3.0 USB Output (MAX 18W); 【3】1* 60W PD/type-C USB Input & Output 【4】1* 18W PD/type-C USB Output; 【5】1* 12V~16V (Max: 15A) Car Cigarette Lighter socket; 【6】1* 2W LED light with 3 modes( Strobe, Solid, SOS).

🌟EASY CHARGED METHODS: You can charge the power station by 3 methods. [1]110V AC wall power socket to charge fully within 8 hours. [2]12V car cigarette lighter can fully charge around 8~9 hours. Or with a 60W PD charger (NOT included) plug in the 60W PD type-C socket to charge fully around 7 hours. [3] You can also use solar panel to charge the power station during the daytime anywhere. Suggested 60~150W (15V/3A) Solar Panel (Purchase separately), the charged time depends on the sunlight.

[Function]: ATIMA Dual Fuel System Extender Kit can power two generators simultaneously. It is very easy & convenient to use. Just connect the pipes, combo kit gas cap tube and attach them to a Honda Generator or any other compatible generators. The generator then can intake the fuel from the external tank and it can extend the operation time.

[Composition]: This kit includes one long fuel pipe with automatic lock; two short fuel pipes connected to the fuel tank cap and two fuel tank caps. The tight fitting of the fuel pipe prevents oil leakage.

[Advantage]:1: Run honda generator fuel extender System Each fuel pipe interface is a quick interface, so it is very convenient to connect .2: When using our products, the generator ,fuel tank and leather pipe are directly connected, not twisted, reducing the distortion of the leather tube and increasing the service life.

🔋【Portable Power Inverter Generator】Attach with for Milwaukee 18V M18 battery 48-11-1850 to provide continuous power or recharge personal devices and small electronics with 1 AC 110V-120V Outlet, 1 USB-C PD Port, and 1 USB-A Port. Quickly charge up to 3 devices at the same time. Modified Sine Wave inverter working faster, quieter and more stable. Also it could be a portable power supply for outdoor activity, like camping, hiking and fishing.

🔋【Compatible with Milwaukee 18V Battery】Suitable for Milwaukee 18V Lithium Batteries, such as 48-11-1815, 48-11-1820, 48-11-1822, 48-11-1840, 48-11-1850, 48-11-1860 etc., turns for Milwaukee batteries into small generators.

🔋【Reliable wireless power】Charge your laptops, tablets, cellphones, kindles, game consoles, lights, speakers, TVs, cameras, drones, and more. Not compatible with products over 200W such as, most power tools, fridges, coffee pots, microwaves, etc. Perfect for home or travel. Phone-size design is ideal for work, jobsites, camping, tailgating, vacations, home emergency backup power, and wherever outlets are scarce. (Below 200W)

[Massive Capacity] Oukitel P5000 portable power station can power 99% of home devices with 5120wh capacity and 2200 watt AC output, such as refrigerator, washing machines, etc., offering massive power for your house or workshop.

[Latest Ultra AC Charging] Fully recharge the 5120wh solar powered generator P5000 in 2.8 hrs with 1800W wall outlets or solar charged in 5 hours with 3*400W solar panels by the industry-leading solar conversion efficiency of up to 23%.

[Long Lasting Lifespan] The built-in LiFePO4 battery with excellent safety and long service life, you can use for about 10 years, 6500 cycles to 70%, battery management system can manage the voltage and temperature of the battery to avoid high temperatures and overcharging.

🌍Portable Power Stations Bundle includes a Portable Power Station 350W with Wireless Charging and Portable Generator 300W,Pure Sine Wave Output for Outdoors Tent Camping

🌍【ZeroKor 350W portable power station】Features 2*standard 110V/350W AC pure sine wave output outlets, 2* DC ports(12V/8A 24V/3A), 2* 5V2.4A USB ports(5V/3.1A Max), 1* USB-C quick charge port(5V 9V/2A 18W Max), 1* 12/8A cigarette lighter port with regulated voltage Function and wireless charging. The regulated voltage output allows you not to worry about the power station shutting down when charging mini refrigerator or CPAP machine.

🌍【ZeroKor 300W Portable Power Station】With 2* 110V/300W AC outlets , 1* DC output port (9V-12.6V/10A Max ), 3* 5V/3A Max USB ports, 1*quick charge USB port (5V/3A 9V/2A Max)； Flashlight with reading mode and SOS emergency mode for your outdoor Van Life Explorer

POWER YOUR EXPECTATIONS: WETOWN LiFePO4 Power Station WT1500A with 1280Wh Capacity, provides 4*Pure Sine Wave 1500W AC outlets to power up 90% home electrical devices. Support 1200W AC input, it can be fully recharged via Wall Outlet in 85min.

High Efficiency Solar Panel: WETOWN Foldable Solar Panel SP200W made of Multi-Layered Monocrystalline Silicon Cells to generate energy at 23.5% conversion efficiency. ETFE Lamination Surface with IP67 Waterproof & Dustproof will protect from water splashing.

Power Station with Solar Panel: SP200W takes 7-8 hours to fully charge a 1280Wh Power Station WT1500A, the Solar Panel provide 5 outlets: MC4(20V), XT60(12A), 2*QC3.0 USB(18W), TYPE-C(60W). Compatible with most Jackery/Ecoflow/Bluetti/Goal Zero/Anker Power Stations, Laptops, Phones...

VERSATILE AND ACCURATE VOLT MA CALIBRATOR: Signal generator, simulator and volt / mA meter for calibrating, testing and repairing milliamp loops, PLC and HVAC systems. Easily generate precise test signals for current and voltage devices (mA, mV and V ranges).

BUILT-IN 24V LOOP SUPPLY lets you power and read a device or transmitter without needing another multimeter. This greatly simplifies testing 2-wire current loops.

MEASURE VOLTAGE OUTPUT SIGNALS from process devices and sensors with two input ranges of 0-100mV (0.01mV resolution) and 0-20V (1mV resolution) with 0.02% accuracy. MEASURE CURRENT TRANSMITTERS within a range of 0 to 24mA with 0.001mA resolution and 0.015% accuracy.

▲【Energy Saving Generator】The portable crank generator with USB port, can charge for cellphone, USB nightlight, USB fan, power bank and other item with USB port. Note: it is not suitable for charge a car battery.

▲【High Quality】Made of high quality metal outer case with anti-slip foot pad more stable, easy to o assembly, at high altitude and low temperature also has great performance.

▲【Portable Crank Generator】This mini crank generator convenient to assembly, small and exquisite, easy to carry, and with internal power storage function. Our portable crank generator suitable for being used in the field, field operations, field trips, rescue operations, natural disasters, survival training, emergency communications, long-term power shortage, tourism, etc.

The frequency range of this DDS signal generator is 1Hz-65534Hz, and the high-speed frequency (HS) output is up to 8MHz.

The power supply automatically restores the last used configuration, power supply: DC 9V.

This portable DDS signal generator has an LCD display, which can clearly display the readings. This DDS signal generator has intuitive touch buttons, which is very convenient to use.

PREMIUM QUALITY MATERIAL: This USB charger generator is made of high quality metal shell with non-slip foot pads, more stable, easy to assemble, and excellent performance at high altitudes and low temperatures.

CONVENIENT TO USE AND CARRYON: This crank emergency USB charger generator is convenient to assemble, small and exquisite, easy to carry, and with internal power storage function.

ENERGY SAVING GENERATOR: The portable crank generator with USB port, can charge for cellphone, USB nightlight, USB fan, power bank and other item with USB port.Note:this generator is not suitable for charge a car battery.

【High Quality High Power Generator】Portable hand crank generator's handle is made of aluminum alloy, foldable, not rusty, easy to carry and easy to use. Specifications:Power Generation: 8-20W 5V,Output Current: 2.1A,110V Output Power: 120W,12V Output Power: 23.6W,Net Weight: 1.8kg,Gross Weight:2.15kg,Product Size: 4.7*2.4*7.9in.

【Good Performance,USB Function】12V Direct output, direct intercom,routing 110V AC output function, can work even when the power is off. USB 5V output function, can directly charge all cell phones, tablets, game consoles.

【Large Capacity】Large capacity power lithium battery, stable output and strong carrying capacity. The lithium battery comes with its own protection circuit and supports external charging.

◎ Excellent Performance: The Schumann wave 7.83HZ extremely low frequency generator has MSDS certificate, with high precision and stability, and you will definitely pay attention to the low frequency generator

◎ High Accuracy: The high stable frequency acquisition part of the Schumann waves generator includes high stable pulse chip, precision correction capacitor and precision multi-loop adjustable resistance

◎ Protection Function: The Schumann waves generator has overcharge, overvoltage and overcurrent protection. There is almost no voltage ripple in the voltage source. And we believe that the feature of the Schumann waves generator will draw your attention