Its Generic Waterproof 12V Car Cigarette Lighter Socket USB Charger, its waterproof car cigarette lighter socket which is used in car cigaretter lighter USB charger, Its Small in size. For a thicker panel use a compression plate which keeps the socket in place from the front on a panel of any thickness. its current rating is 15A and the voltage is 12V,  there is no power loss when its not in use. It cant run down the battery.