Bluetooth alarm speaker - built in lithium battery,White,3W

Connection method: Bluetooth connection
Interface type: USB
Frequency response range: 100Hz-20KHz
Output power: 3W
Signal to noise ratio: ≥ 75db
Power supply mode: built-in lithium battery
Channel: 2
Playback duration: 6 hours
Extended storage: 32GB
Bluetooth protocol: 5.0
Number of speakers: 1
Effective distance: 10
Display: Yes
Playback format: MP3, wma, wav
Shell material: plastic
Support app: no
Supported format: TF Card
Speaker adjustment mode: key
Whether there is radio function: Yes
Box material: plastic