1.Bluetooth speaker, mic inside, handsfree function
2.Support tf card/usb drive/aux/fm
3.Rechargeable li-ion battery; charging port: micro usb
4.Play time:3-4h
parameter:
bluetooth distance：10m
bluetooth version:5.0+edr
speaker : 20-50m w
resistance：32ω
f.R.：20hz-20khz
distortion：90db
battery：300mah

available colors: blue, black and brown