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 definitely bigger than all current mobile phones, this mini bluetooth speaker allows you to enjoy a clear, well-balanced, full-range listening experience in camping, picnic and room.BATTERY LIFEThe battery lasts about 2 hours at 100% volumeabout 1 hour at 50% volume.It only takes half an hour to fully charge.Support to play while charging.SPECIAL FUNCTION: Do you feel that it is difficult to operate with one hand when taking a selfie with your mobile phone?This small bluetooth speaker allows you to selfies, with the speaker button using your free hand. You can also phone calls with the click of a button.EASY TO USE: All-in-one nonfunctional button lets you enjoy music hands-free calling camera remote shutter functions by a single press. The speaker is compatible with most devices that have Bluetooth connection enabled, or any smartphones for that matter