An ideal solution for your onboard 12V and USB charging needs.Easy-to-install panel-mount assembly offers compatibility with USB electronic devices that use a standard USB socket for charging. 2.1A rating allows charging two small devices simultaneously or one large device. 12V power supply works with any standard cigarette lighter plug or lockable marine plug. Includes weatherproof caps to keep out dust and moisture.Maximum Output Current: 2.1A DC (total)Input Voltage: 12VOutput Voltage: 5V DC +/- 5%Cutout Size: Two 1 1/8"dia. (28.6mm) holes, 1 3/4" (44mm) apartSafety Features: Reverse polarity, short circuit and thermal overload protection