Bluetooth Mini Speaker. For Nokia Lumia 920, Nokia Lumia 820, Nokia 808 PureView, Nokia Lumia 900, Nokia Lumia 810, Nokia Lumia 822, Nokia Lumia 521 / 520 &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