MotoCity Dual USB Charger Two Port Power Socket with LED Light for Car Boat Marine Mobile 2 Port USB socket charger, input: 12-30V. DC 5V 3.1A. This is a great quality USB charger very reliable range of 12v power sockets/outlets. Suitable for interior or exterior use. Compatible with popular mobile devices USB 2.0, any device including digital cameras, PDAs, mobile phones and USB accessories. Great for the boats or outdoor use due to waterproof cover.