variety of colors to choose from Default color is white 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: 0 Frequency response range: 40Hz-20KHz Output power: 18W Signal to noise ratio: 75db Power mode: Power bank required Channel: 1 Play time time: 8 hours Bluetooth protocol: 4 Number of speakers: 2 Effective distance: 10 meters Function: voice prompt, card insertion, radio, call function Working mode: button Display: Yes Playback format: MP3, WMA Material of the shell: plastic Support format: TF card Speaker adjustment method: button Is there a radio function: Yes Box material: metal Appearance size: 90 * 114 * 122mm Product weight : 1 (KG) Packing list: color box, wire, Manual Power Mode: USB