Input 12-24 volts. Output 5 volts 2.1 amps Power and charge two mobile devices simultaneously. Total power of both ports is up to 2.1 Amps. Two USB ports. Water resistant weather cap. Charges up to 2A when ports are used individually. Use this plug along with your device's own USB cable to charge. This is what BMW and European motorcycle riders have been asking for and here it is. A 2.1 amp dual USB charger for motorcycle Hella， DIN， BMW or European style power socket. A bit smaller than usb chargers for cigarette lighters， this motorcycle plug has been made to fit Hella， DIN， Powerlet or BMW style motorcycle power sockets. It comes with a weatherproof rubber cap. Lights up blue when plugged into a power source.