The LED Fast Car Dual USB Charger is a 4.8A intelligent, fast charger that comes with a voltage display and high voltage warning to ensure safe and secure charging. This charger has a switch that can freely change the display mode and turn on/off the power. When the input voltage exceeds 14.6V, the red indicator light will turn on, signaling a warning that the input voltage is too high. This multipurpose charger can supply power for cellphones, tablets, PCs, GPS, and other USB devices. It can also be used on cars, motorcycles, ATVs, SUVs, UTVs, boats, and more.