1、WIDE USAGE: Power inverter could be used for charging mobile phone, laptop, light, digital camera, electric tool, microwave oven, car refrigerator and more, making travel easier. 2、COOLING FAN: Built in silent auto control cooling fan, makes it easier for the inverter to dissipate heat, prevent from overheating, with low noise. 3、USB PORT AND LCD DISPLAY: The power inverter also comes with USB socket, can output DC5V voltage. LCD screen allows you to intuitively understand the charging state. 4、EXCELLENT PERFORMANCE: The inverter has higher driving capacity, better protection for sensitive equipment, lower sound and electrical noise, and lower power consumption. 5、HIGH SAFETY: Stable charging design of the car inverter could prevent overheating, undervoltage and overvoltage charging, short circuit, over load, over current, with flame retardant protection, highly safe to use. 1 x Power Inverter2 x Crocodile Clip Cable1 x User Manual Item Type: Power InverterMaterial: Aluminum AlloyOutput Waveform: Corrected Sine WaveOutput AC Voltage: AC 110V 60Hz (±5%)Output USB Voltage: DC 5V 2AOverheating Shutdown: 60℃ (±5%)Actual Power: 300WMaximum Power: 500W Input VoltageUnder Voltage Alarm Low Voltage Shutdown  Over Voltage ShutdownNo Load Current Conversion Efficiency  DC12V (DC11-15V)  9.5- 11.0V  9.0- 10.5V  14.5- 15.5V < 0.3A 80% DC24V (DC21-29V)  19.5- 21.0V  18.5- 20.5V  28.0- 30.0V < 0.5A 80%