Specifications:Input voltage: DC 10.5V~15V,(When the battery voltage is lower than 10.5V, the inverter features low voltage protection, when the battery voltage is higher than 15V, the inverter features high voltage protection.)Output voltage: AC 110V /220V for your choiceOutput frequency: 50Hz for 220V model /60Hz for 110V model.Rated power: 300/500WOutput waveform: Modified sine wave.Package Size: about 20*11*4.9cm (7.8x4.3x1.9 inch)Weight: about 0.8 kgAdavantage:500W Power inverter: Car power inverter with 2 USB ports and AC outlet. Surge power: 300W/500W, The power inverter comes with free cigarette lighter and 2pcs battery clips,providing 300Watt/500Watt continuous power, 4000watt/6000watt peak power (Please make sure that the total rated power of the connected devices is 300W/500W).LED BATTERY DISPLAY: Battery Level Bar for LED Display shows the battery Capacity, which can remind you that when your battery no power. When connect the battery with inverter, this LED Screen work and show the real-time capacity of battery. It have five level (lattice) of the Battery Level Bar, and each lattice represents 20% of the battery power. When yourbattery is no power, the display will flash to remind you that you need to charge your battery.Fast Charging Dual USB ports: One AC Outlets and two USB ports can offer 100% fast charging for Mobile phones, computers, laptop,breast pump, Nebulizer, Razors, medical rescue device, emergency equipment, etc. Can be as a Emergency Power Supply.Multi Protection: Built-in fuses, safe charging design and cooling fan prevents the car power converter from over-heat, saving power and energy. Over voltage, overload, over-current, short circuiting, under-voltage, overheating, short circuit protection.Lightweight design &Top Quality: Lightweight and compact, ideal for vacations, camping and work trips. It can be plugged into almost any 12V power output vehicle, providing charging opportunities anywhere.What you get: car power inverter, user manual, 2 x Battery Clamp, 1 x Car Lighter Plug.