About this item SIZE JUST LIKE A COIN: It may be the smallest wireless speaker in the world. You can easily put it in your pocket, hang it on your phone or backpack, and take it wherever you want. MINI SIZE BUT POWERFUL SOUND: The volume is bigger than most mobile phones. This mini Bluetooth speaker delivers a clear, well-balanced, full-range listening experience for use during camping, picnics, or in the room. BATTERY LIFE: The battery lasts about 2 hours at 100% volume and about 1 hour at 50% volume. It only takes half an hour to fully charge. Supports playback while charging. SPECIAL FUNCTION: This small Bluetooth speaker allows you to take selfies using the speaker button with your free hand. You can also answer phone calls with the click of a button. EASY TO USE: An all-in-one button lets you control music playback, hands-free calling, and camera remote shutter with a single press. The speaker is compatible with most devices that have Bluetooth connectivity, including smartphones.