Portable Boombox style Wireless Bluetooth Dual 52mm Speaker with Speakerphone, Support Microo SD Card, Indoor/outdoor Portable, USB Cable Charging Function (Black color) Top quality wireless Bluetooth Speaker with amazingly booming clear sound. Sound quality as good as other leading brands in the market, with a portion of the cost. Built in microphone works just like a hand free device, compatible with ALL mobile and smartphones. So compact it can be played at any Indoor and Outdoor events. USB charging, charge time: 4 hours, play time: 12 hours.