variety of colors to choose from Default color is black If you need to change other colors Please leave message to us for change within 12 hours of order submission Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 800mAh Frequency response range: 40Hz-20KHz Output power: 3 w Signal to noise ratio: 75db Power supply mode: built-in lithium battery Channel: 1 play: 4 hours Bluetooth protocol: 5 Number of speakers: 1 Effective distance: 10 meters Function: card, call function Working mode: button Display: None Playback format: MP3 Shell material: plastic Support format: TF card Speaker adjustment method: button Is there a radio function: None Box material: plastic Appearance size: 138 * 50 * 86mm Product weight: 0.8 (KG) List of package: manual, packing box, charger, speaker M power supply: USB