--Plug the AC plug of the AC to DC charger into any power outlet in your home, then connect the cigarette lighter socket to your device--This 12V DC power adapter is a must- have for car users. Suitable for in-vehicle equipment that needs to be powered by the 12v 8.5a cigarette lighter plug adapter--Use for car cigarette lighter, work perfectly with car vacuum cleaner, car vacuum cup, car air fan, car air purifier, car shaver, car inverter, car massage pillow, car MP3 or other DC 12V device with rated power less than 100W Specification:Item: 100% Brand New Power AdapterInput Voltage: AC 100~240V 50/60HzOutput Voltage: DC 12VOutput Current: 8.5A maxOutput Power: 100W maxDC plug: Car Cigarette Lighter SocketDC Cable length: about 110cmAC plug: US 3-prong PlugAC Cable length: about 110cm