Wireless Alarm Clock SpeakerType: 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
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