Bluetooth Mini Speaker. For All Microsoft Windows 8, Surface, Microsoft - Surface 2, Microsoft - Surface Pro 2, Surface RT Tablets &More Digital Devices. Digital USB and Stereo Cable Included. Built-In Microphone. Play Music | Complies with Bluetooth 3.0 10 meters / 30 feet range | Height: 2" Width: 4.25" Works with most bluetooth enabled devices 3 Hours of Working Time | About 25-30 Hours of Standby Time | Comes with detachable rechargeable lithium battery AUX Stereo Input function to work with non-bluetooth devices