Bluetooth speaker USB card phone computer small steel gun mini subwoofer wireless led light emitting small audio

Connection: bluetooth connection
Interface type: USB
Battery capacity: 300mah
Frequency response range: 100hz-20khz
Output power: 3W
SNR: 75dB
Power supply: built-in lithium battery
Channel: mono channel
Duration: about 2 hours
Extended storage: 16GB
Bluetooth protocol: 2.1
Number of speakers: 1
Effective distance: 10 meters
Function: voice prompt, insert card, call function
Playback format: MP3
Shell material: plastic
Support format: U disk
Sound box adjustment mode: button
Box material: plastic
Appearance size: 58*53mm
Power mode: USB