1.This is a three hole socket. The maximum output is 70W. It is suitable for 12V and 24V power supply. Digital device can get the power through one of the socket.
2.The cigarette-lighter plug has USB interface. It provides 5V power for cell phone, media player, PSP, digital camera, etc.
3.When plugs in the charger, the LED indicator will turn on. If it is off, check whether the device is short, or the fuse is burnt.