We are offering 150w usb car power inverter adapter dc 12v to ac, 220v usb car charger input voltage: dc 12voutput voltage: ac 220v10%color name: silver installation method of use:1. Cigarette lighter plug into the car cigarette lighter socket, ensure that put in place and good contacts.2. And ensure all electrical appliances power is 150 w and 150 w the following can be used, will appliances 220 v plug directly into converter end of the 220 v socket, and make sure that the two sockets connected to electric power of 150 w in within.3. And open the converter switch, the green light, said the normal work.4. The red indicator light is bright, said for overvoltageunderloadthermal, resulting in converter shut off.5. There are a lot of circumstances, the car cigarette lighter socket output is limited, make normal use converter alarm or turn off, then as long as the launch vehicle or decrease the electricity power can return to normal. Output voltage: 220 vfrequency: 50 hzwaveform: square waveinput voltage: 10-15 vbuilt-in fuse: 20 aunder-voltage alarm: 10.5-11.1 vlow pressure turn off: 9.8-10.4 voverpressure turn off: 14.5-15.5 vcontinuous output power: 120 w30 minutes continuous output: 150 wpeak power: 300 w