1、Intelligent 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. 2、Safety 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. 3、Good 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. 4、Reliable Performance: The 420 watt modified sine wave power inverter has fast dynamic response, good control performance and good electrical performance index. 5、Durable Shell: The aluminum alloy shell of the 420W power inverter is solid and durable, which can prevent collision and falling. Item Type: 420W Car Power Inverter Material: Aluminum Alloy Weight: Approx. 730g / 25.8oz Output Frequency: 50HZ Output Waveform: Modified Sine Wave Battery Loss Without Load: ＜0.2A Maximum Power Amplifier: More Than 95% Low Pressure Alarm: 10V-11V Over Temperature Protection: 55℃ - 77℃ Rated Power: 420W 1 x Inverter 1 x Cigarette Lighter 2 x Battery Clip 1 x English Manual