This smart phone holder is designed to mount on the car accessory socket. It features a pass through socket to retain the function of the car accessory socket. There is a USB charging port on the side of phone holder which you can use to charge your phone using an optional USB charging cable. This package included an 5V USB car charger, you can plug this into the car accessory socket on the phone holder and charge a second device using an optional USB charging cable. The phone cradle is tiltable and 360° rotatable. The cradle arm fits devices from 55mm to 88mm wide. Suits Android or Apple smartphones.