Dual USB Car Charger,Cigarette Lighter Voltage Meter,Compatible for Apple iPhone,iPad,Samsung Galaxy,LG,Google Nexus,Other USB Charging Devices, Black

Dual USB Car Charger3.1A for Total Two USBDiagnostic/Voltmeter Gauge With BatterySmart Charging System Monitor for 12V-24V CarLED Amperage & Voltage Display with Visual AlertDual USB ports allow to charge two devices at once at car.With total 3.1A USB ports,can intelligent output current depending on the charging product.When charging cellphone,it maybe output 1.0A,when charging ipad,it maybe output 2.1A.The LED display will show the amperage when charging.Smart charging technology identifies device to deliver optimum charging efficiency and protect against overcharging,overheat,overcurrent.The LED display is easy to read and not harsh on the eyes.  For 12V car, voltage display of car battery under 11.5V or higher then 14.9V means a car battery issue. For 24V car, voltage display of car battery under 23.1V or higher then 27.3V means a car battery issue. High or Low voltage can indicate a battery issue.A flashing display indicates a potential vehicle voltage problem.A subtle blue light glow from the LED display allows you to easily see where to plug in devices in dark. The extra intelligent circuit design can quickly cool down to prevents the car charger and your devices from over-temperature, overcurrent, overvoltage and overload.Compatible for Apple iphone 4/4s,5/5s/5c,6/6 plus,6s/6s plus,7/7plus,8/x,ipod,ipad,Samsung / LG / HTC. Most of phone and tablet1 x Dual USB Car Charger.(Charging Cable NOT included) 1 x Color Box