High-end blue LED Back-lit Rocker switch style with dual USB FAST charger. It has 12-24 DCV input and power outlets are 2.1A each port (4.2A total) for fast charging mobile phones, PDA, tablets, cameras, GPS and other devices. Rocker switch style dual USB fast charger to save space and eliminate using annoying cigarette lighter plugs. Unlike the 3.1 amps, this product has equal 2.1 amps each port that makes it 4.2 amps and far superior product. It has output short circuit protection, overload protection, polarity protection, overcharging, multiple protections for more security and safety. CE certified-environmentally friendly flame retardant material. This USB fast chargers is great for boats, side by side Yacht, ATV, speed boats, RV, cart, most project cars. Older verhicles. Superb Quality Control-Electrical tests were performed (voltage, power, temperature, and insulation resistance test) and assembled so that it will have strength and rigidity to resist the abuses it may encounter.