Features: 5000mAh capacity external battery with unique intelligent power indicator, accurately shows the power level left. Mini and portable design for conveniently carrying with. With a micro USB cable, connect with your PC USB port for charging the battery power. Constant voltage and current-limiting, short-circuit protection for output. Must have on your outdoor travel. 2.1A high-speed output, safe and fast charging your mobile device. Adopts high quality coating material, wearable and durable, gives you a smooth and comfortable hand feeling. Widely used to charge for your phones, tablet, MP3, MP4 and many more.