Classic 16000mAh Power Bank Brilliant External Battery Pack for iPhone Samsung HTC LG Smartphones Tablets - (gold) Function: Short-circuit Protection, Input Overvoltage Protection, Output Over-Current Protection, Output Overvoltage Protection, Over-charge Protection. Dual USB output, max 5.1V/3.6A while dual USB working, higher than the common power bank, faster and more convenient for charging two devices at the same time. Suitable for a wide range of occasions, such as parties, BBQs, and outdoor activities like camping and picnics Four LEDs to show battery level.Integrated aluminum alloy shell, high structural strength and elegant appearance.