DUAL USB CAR CHARGER :Powered by your car's DC outlet(arette 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 fing LED display indicates a potential vehicle voltage problem.SMART OVER-CHARGE PROTECTION: ligent 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.The LED display is easy to read and not harsh on the eyes.For 12V-24V car, voltage display of car battery 12.5V means a car battery iue.High or Low voltage can indicate a battery iue.A fing display indicates a potential vehicle voltage problem.e you road peace of mind.Colour:black/RedMaterial:Aluminum alloy + ABSPackage Contents:1 x Car ChargerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.