Description DUAL USB CAR CHARGER :Powered by your car’s DC outlet(cigarette lighter port).allows charging of two devices at once. TOTAL 4.8A: The output total 4.8A. The charging speed is up to 40% faster than conventional chargers and works with all USB-powered devices. BATTERY VOLTAGE METER:Display the voltage of vehicle’s battery when plug.Let you always monitoring the health of battery and peace of mind when drive.A flashing LED display indicates a potential vehicle voltage problem. SMART OVER-CHARGE PROTECTION: Intelligent circuit design protects against short circuiting, overheat, overcurrent, and over charge.Charges mobile phone quickly and efficiently.And protect the safety of charging device. COMPACT DESIGN FOR MORE PORTABILITY :Fits in the palm of your hand.DC input: 12V-24V / USB output:4.8A; / 2.3″ x 1.4″ x 1.4″.12-month money back.