This is a bluetooth speaker with small appearance, and it is easy to carry. By concise geometry design, the whole product does not have too many curved surfaces. Bluetooth connects to the phone to plays music or as speakerphone, that is to say, you can speak directly to the speaker. The built-in polymer lithium battery lasts for about five hours. The silicone belt on the side of product has a perforated hole, which can wear mountaineering buckle and so on. In the square of the speaker hole, indicator light and Mic head are hidden, which can make the product more overall and concise. Design of key is also one of the highlights of the speaker, for the button "+" "-" icon, long press is to control the volume, short press is to change the music, and we design this icon to combine the volume icon and the switch icon better.