Features: 1Intelligent Cooling Fan: The built in powerful intelligent cooling fan works only when the equipment gets hot slows down and stops working when the temperature drops which makes the inverter work quietly most of the time. 2Safety and Protection: The 420 watt modified sine wave inverter is equipped with safe charging technology providing protection against overheating undervoltage and overvoltage charging short circuit overload and overcharge. 3Good Features: 420 watt power inverter can adjust the amplitude and frequency of output voltage or current flexibly and significantly reduce the volume and weight of electrical equipment and save materials. 4Reliable Performance: The 420 watt modified sine wave power inverter has fast dynamic response good control performance and good electrical performance index. 5Durable Shell: The aluminum alloy shell of the 420W power inverter is solid and durable which can prevent collision and falling. Specification: Item Type:420WCarPowerInverterMaterial: Aluminum AlloyWeight: Approx. 730g / 25.8ozOutput Frequency: 50HZOutput Waveform:Modified Sine WaveBattery Loss Without Load: 0.2AMaximum Power Amplifier: More Than 95%Low Pressure Alarm: 10V-11VOver Temperature Protection: 55 - 77Rated Power: 420W Package List: 1 x Inverter1 x Cigarette Lighter2 x Battery Clip1 x English Manual