High & Low Current USB Outputs. Quickly and safely charges your tablet and hand held mobile device simultaneously. Fits into any 12V port. Suitable for: All mobile phones, All Tablets, MP3 Players, E-Cigs. Input: DC12-24V. Output: DC5V - 2100mA. Use your existing USB charging cables to charge USB devices. Easy to see LED confirms whether USB charger is properly connected. Dual port design, one 2 Ampere port for tablets and one 1 Ampere port for mobile phones or other relevant devices. Sophisticated circuit design with over-heated, over current, over charging protection. Charging will automatically stop when battery is fully charged. Cables not included. Not suitable for HGV with output of more than 2.4V.