Mini Bluetooth Speaker-small But Good Sound Quality,photo Selfie Button And Answ The size is the same as a coin: it may be the smallest wireless speaker in the world, and you can easily put it in your pocket, hang it on your phone or backpack, and take it with you. Mini size but powerful sound: The volume is definitely louder than all current mobile phones. This mini Bluetooth speaker allows you to enjoy a clear and balanced all-round listening experience in camping, picnics and rooms. Battery life: about 2 hours at 50% volume, about 1 hour at 100% volume. It only takes 30 minutes to fully charge. Support playing while charging. Special function: Is it inconvenient to operate with one hand when taking selfies with a mobile phone? This small Bluetooth speaker can freely use the speaker button to take selfies. You can also make a call by clicking the button. Easy to use: The integrated non-function button allows you to enjoy music/hands-free call/camera remote shutter function with one key. This speaker is compatible with most devices that support Bluetooth connectivity or any related smartphones