The 12200mAh Power Bank with three USB is Compact, Slim, portable, smart design featuring a LED power indicator. Easily fits into your bag to provide instant power. Powerful with long operation time for long flight, trip, or whenever you need to charge your mobile devices wherever you are. Built-in high capacity rechargeable battery . Powerful with long operation time, the USB output, more convenient. High efficiency of power conversion. Electricity-saving function?LED battery indicator. Portable, practical and long cycle life. Safe and reliable, perfect for using on travelling and outdoor activities.