Acepro 12V 2.1A 2 USB Ports Waterproof Motorcycle Power Socket, Suitable for Motorcycle Car Boat, Best for Harley Ducati Buell Victory Material: Good Quality PVC Socket Body and ABS Mounting Bracket Direct connect to 12-24 Volt DC system Waterproof,Shockproof(Don't charge in raining day) It can be sticked or tied onto motorcycle Input Voltage 12V-24V  4.0V; USB Output Voltage 5V  0.25V (USBx2) Cable Length: 1.83m