Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 1000mAh Frequency response range: 100HZ-20KHZ Output power: 3W Signal to noise ratio: 75dB Mode d Power supply: built-in lithium battery Channel: 2 Playing time: 10 hours Bluetooth protocol: 5 Number of speakers: 1 Effective distance: 10 meters Function: voice prompt, card insertion, AUX connection Working mode: button display : None Playback format: MP3 Shell material: wood Media format: TF card Speaker adjustment method: button Is there a radio function: None Housing material: ABS Appearance size: 112 * 105 * 57mm Product weight: 0.25 (KG) Packing list: small speaker, outer packaging, charging cable, manual, certificate, warranty card Power mode: USB