P21 wireless bluetooth speaker $ 27.33 Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Battery capacity: 1800 mA Frequency response range: 100HZ-20KHZ Output power: 10W*2 Signal to noise ratio: 75dB Power supply mode: built-in lithium battery Channel: 2.1 Expansion storage: 32GB Bluetooth protocol: 4.2 Number of speakers: 2 Effective distance: 10 meters Function: insert card, voice prompt, call function Operation mode: button Play format: MP3 Shell material: plastic Speaker adjustment method: button
