The Railblaza E Series USB StarPort is a unique and versatile mount that combines a 2.1 Amp USB connector within the StarPort base allowing you to charge your tablets, mobile phones and many other devices. It is designed for use on a 12 VDC supply, rated at 2.1Amps. For charging only and not for data transfer. The E Series USB StarPort is splashproof however Railblaza do not recommend mounting in weather exposed areas.