Description: Input: 12~38V, can be used for trucks, boats, ATVs Output: 5V 4.2A Works great as a replacement or extra dual USB charge in car switch panel Over-heated,over-current,over-charging protection, charging will be automatically stop when battery is full Compatible with popular mobile devices USB 2.0,any device including digital cameras,PDAs,mobile phones and USB accessories Specification: Easy to use and install Waterproof cap cover Compact design 2 USB ports are great for charging Color: Black Dimension(LxWxH): approx.45*38*38mm/1.77inchx1.49inchx1.49inch Package Includes: 1 Piece Car Dual USB Port Charger Note: This charger does NOT come with LED light Voltmeter!! USB port charger function only!