ITEM NAME:Removable Motion Bluetooth Speaker, Bluetooth Watch, Speaker, Wristband, Au U6H3 Removable Motion Bluetooth Speaker, Bluetooth Watch, Speaker, Wristband, Au U6H3 Connection mode: Bluetooth connection Interface type: USB Battery capacity: 480mah Frequency response range: 40Hz-20KHz Output power: 2W Signal-to-noise ratio: greater than 70dB Power supply: built in lithium battery Duration: 3 hours. Extended storage: no support Bluetooth protocol: 4.2 Effective distance: 10 meters Function: call function Playback format: MP3, WMA, WAV Case material: ABS+Metal Appearance size: 108*08*60mm colour:black Package Contents: 1 * Bluetooth Speaker 1 * Manual 1 * USB cable