Silver gray ultra-thin bluetooth speaker
Battery capacity: 680MAH
Frequency response range: 40Hz-20KHz
Signal to noise ratio: =75dB
Power supply: built-in lithium battery
Playing time: 3-4 hours
Extended storage: 32GB
Bluetooth protocol: 4.1
Effective distance: 10 meters
Function: drop-proof, voice prompt, card insertion, call function
Shell material: ABS
Support format: TF card
Appearance size: 13x75x25cm
Power supply: USB