TechGear USA [TM] Luminicent Visible LED Moving Curent Smart Charger for iPhone 5, iPad 4, and other Apple Device (iPhone 5 Black) Electroluminescent (EL) technology to see current flow as charging Visible current flowing speed indicates the iPhone battery level: 1% - 65% FAST; 65% - 99% SLOW; 100% OFF Shuts off power from the source when your device is fully charged Convenient to use in home, office, or car: you could charge your electronic devices via this standard USB cable with wall charger, PC, or the USB port in car 90 Day Warranty by TechGear USA [TM]