This Five Oceans' waterproof Dual Port USB Power Socket with Rubber watertight Cap is the best option for boats and it's also great to be used on an RV, caravan, etc.
12V-24V, output for each outlet is 2.1 Amps. Capable of loading up to 5VDC, it can charge up any smartphones, tablets and GPS devices. Easily adds reliable and uniform power for portable devices.
Complete with tethered protective cap and internal thermal protection to prevent overheating. Dual-port USB design allows users to charge up two devices at the same time.
Dual-Port USB Charger
Input Voltage: 12V DC
Output Voltage: 5V/2.1A
Compatible for iPad/iPhone/iPod Touch/Smart Phone/HTC/Samsung/Nokia/Sony/GPS/PDA/MP3 etc.
LED Power indicator
Black UV stabilized housing and rubber weather-flap cover for weather protection
2 pole protected terminal connections
2 USB output ports allowing charging 2 devices at the same time:
Output: DC 5V 2.1A
Short circuit / overheat protection
Quick Connect Terminals
PRODUCT NUMBER: FO-3656