White 12/24V Dual USB 2.1A socket mount charger allows you to charge two mobile devices on the go Internal fusing Conformal coated circuit board for the harsh marine environment Protective dust cap keeps debris and moisture out Max output charge 2.1A DC (total), input voltage range: 9V-32V DC, output voltage: 5V DC+/- 5% Thermal overload protection, short circuit protection, and reverse polarity protection Mounts in common 1-1/8" (29 mm) diameter hole