Charge two mobile devices on the go. Made with corrosion resistant materials to ensure solid contact and low voltage drop. Maximum Output Current: 2.1A DC/Cut Out Dimensions: 1-1/8" dia. hole. Reverse polarity, short circuit and thermal overload protected. Easy to install in existing 12V DC socket hole providing convenient access for charging mobile devices. Blue Sea Systems prides itself on engineering quality products for the harsh marine environment that are built to last. Products meet ABYC, NMMA, and Coast Guard standards. Conformal coated circuit board to stand up to the harsh marine environment.