... circuit protection Reverse polarity protection. 12V DC-AC Car Power Inverter with USBDescriptions:The Power Inverter DC-AC1, Rated Power: 100W2, Peak Power: 150W3, Input Voltage: 11-15V DC4 ... 50Hz or 60Hz6, Output Voltage for USB charging port7, 5V DC 300-500mAh(0.5A max)8, Convert Efficiency :>95%9 ... Voltage Shutdown: DC15V-16V10, Low Voltage shutdown: DV10V-11V 12V DC-AC Car Power Inverter with USB