Vktech&reg; 4in1 3.1A Dual USB Car Charger Cigarette Lighter Voltage Digital Panel Meter Volt Voltmeter Monitor for iPhone 6, 6 Plus, 5s, 5c, 4s, 4 Samsung Cellphone (Blue) FAST DUAL USB CHARGING PORTS - Combined 3.1 amps; 10W; uses smart technology to ensure each device pulls the right amperage. Charger is powered by the vehicle's cigarette lighter LED DISPLAY - LED digital luminescence tubes; Display cycles between internal temperature (Fahrenheit), device's charging current, and the voltage of the vehicle's car battery. (Note: When using the device to charge, it display the charger's temperature instead of the internal temperature of your car. ) The LEDs are bright enough to read the display without being a distraction while driving SPECIFICATIONS - Input: DC 12V - 24V, Output: DC 5V/3.1A, 10 W, Conversion efficiency 95%, Measuring range: Voltage 5V-25V, Current 0 - 3.1A, Temperature -4 to 176 F Compatible with iPhone 6, 6 Plus, 5s, 5c, 4s, 4, iPods, iPad, Samsung Galaxy Note 2, Note 3, S2 S3, S4, S5, HTC One, LG G3, Most Android/Windows Smart Cell Phones, GPS, Tablets, and Other USB-charged Devices Package Includes: 1 x JEBSENS 3.1A Dual USB Car Charger with LED Display. (Charging Cable NOT included) 1 Year Gurantee provided by Manufacturer