The Kocaso Power bank is a powerful energy backup that can add hours of power to your digital devices due to its lithium polymer battery. With the keychain attachment, never be on low battery again. Power bank is portable, convenient and compact enough to fit inside a purse or backpack. Ideal for charging mobile phones, MP3/MP4 players, digital cameras, GPS and game controllers. Includes charger and USB cord. Comes packaged in hanging box with window.