This mini keychain power bank serves as an essential tool for charging and extending the battery life of various standard USB devices such as tablets, mobile phones, wireless speakers, and e-readers with a battery capacity of 1200 mAh and total output power of additional batteries. Its waterproof rubber surface is designed to withstand extreme outdoor conditions and is suitable for activities like camping, hiking, and mountaineering. The compact design makes it easily transportable while the built-in carbine gun allows for convenient attachment to a backpack or belt. With 2 output ports, Type-C and iPhone, this power bank is compatible with all Type-C devices and can also be used for iPhone charging. Expertly crafted with a square aluminum case and polymer lithium ion cells, this power bank boasts a sleek industrial style and a 1200MAH power capacity. It also includes a USB charging cable and instruction manual for added convenience.