Actpe 3.1A Dual Port USB Rapid Car Charger, Cigarette Lighter Voltmeter with LED display & Car's Battery for iPhone, iPad, iPod, Samsung, LG, Android, PSP, GPS & All USB Plugs - Low Battery Alarm Combined 3.1 amps; uses smart technology to ensure each device pulls the right amperage. Charger is powered by the vehicle's cigarette lighter. LED DISPLAY - Digital LED displays device's charging current and the voltage of the vehicle's car battery. High-quality and safe, with protections against overheating, over current, over voltage and overcharging. Charging will stop automatically when battery is full. Compatible with iPhone 7 Plus 6S, 6S Plus, SE, 6 Plus, 6, 5s, 5c, 4s, 4, iPods, iPad, GPS, PSP, Samsung Galaxy Note 5, 4, 3, 2, S7 Edge, S6, S5, S4, S3, S2, HTC One, LG G5, G4, G3, Most Android/Windows Smart Cell Phones, Tablets, and Other USB-charged Devices. Certified by RoHS, CE & FCC, high-quality fire proof material. 30 days money back and 1 year warranty.