XIAOMI 5000mAh Ultra-thin 9.9mm Power Bank For Mobile Phone Compatible with iPhone, HTC, Samsung, smartphone and Tablet PC(the power bank will adjust the output power automatically to meet different devices' needs). Function: Short-circuit Protection, Input Overvoltage Protection, Output Over-Current Protection, Onput Overvoltage Protection, Over-charge Protection. Four LEDs to show battery level. Package Includes: 1 x Power Bank 1 x USB Cable