USB Charger Joint Optical Fiber LED Lighting Data Cable for Iphone5 Ipad4 Ipad Mini (Blue) See the power current run through the cable as it charges your device. Speed of flowing light varies according to the intensity of charging current When your iPhone is low on battery, the LED light flows quickly. As your iPhone charges the LED flow slows until fully its fully charged. optical fiber technology lowers power consumption and saves energy. Automatically shut off EL light when fully charged. Compatible with all new 8-pin charging devices. Hotsysnc & Charging all in one. Connect your cellphone with your PC/Laptop by USB port