Adds Bluetooth connectivity to GROM USB3 and MST4.
Plugs directly to the extension port of GROM box
Gives wireless handsfree calling (accept/reject call/hang up)
Activate voice commands!
Allows for wireless A2DP playback with AVRCP control
Compatible with large number of phones
Plug and play
10FT long microphone
Not needed for BT3, it’s included