Portable wireless bluetooth 4.2 with built-in mic and remote shutter 4-hour playtime, rechargeable. Aluminum shell - perfect for apple Iphone IOS android. Extensive connectivity – utilizes bluetooth 5.0 technology to pair with any bluetooth compatible device for quality music anywhere you are. Metal shell (aluminum shell), net cover, horn, PCBA board, bottom cover, silicone pad. 1.5" diameter.