Wireless alarm clock speaker

Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 4400MA Frequency response range: 100HZ-20KHZ Output power: 10 Signal to noise ratio: ≥70db Power supply mode: built-in lithium battery Channel: 2.1 Play time: 6 hours Bluetooth protocol: 4.1 Number of speakers: 2 Effective distance: 10 meters Function: insert card, remote control, radio, call function Operation mode: button