Car adapter with 2 USB ports instantly recognizes your device for optimal high-speed efficient charging up to 2.1A. Protection against overheating and overvoltage. Full charge recognition. The adapter will stop charging when 100% is reached.Safe to use:Designed with high safety standards: protective circuitry and high-quality chipset to prevent the product or your devices from overheating/overloading. Tested and verified by RoHS, CE & FCC. High quality fireproof material and anti-oxidation aluminum. No signal interference for radio, Bluetooth or Wi-Fi functions inside the car.