OEM AT&T 75372 rapid Car Charger Cigarette lighter adapter lets you charge your phone, PDA phone or micro USB device in the car and provides unlimited usage time while in the car. Integrated USB port lets you charge another device like an MP3 player or another cell phone at the same time via a USB cable. Swivel cap conceals USB charging port when not in use. AT&T Car Charger w/ USB Port plugs into your car, truck or SUV's 12V cigarette lighter socket. Enhanced internal circuitry to manage charging status and prevent over- and under-charging. Integrated electrical fuse to prevent damage to phone or battery.