for the Radio have same port with the Relay Function！！if you don't know your radio fit it or not, please contact me freely!!
 
Features：
Battery volume : 1400mAh
Adaptor length:82mm
Connection : Bluetooth
Working time : 2 days by field test
Standby time : one week
Receiving range :10 Meters
Compatible with: QYT 8900 KT-8900R, KT-7900D, KT-8900D, KT-8900RE, KT-UV980 Mobile Transceiver.
Noticement:
The BT-89 is microphone, also is speaker. it means it has microphone and speaker function.
Pls try to use it on computer. Open the menu of 8900D, find "REP-M", and set up the "CARRI".
 
Package Listing:
1 × QYT BT-89 Wireless Hand Speaker Microphone.
1 × USB Charging Cable for Hand Speaker Microphone.
1 × 8-PIN Bluetooth Wireless Adapter/Dongle.
1 × Belt Clip for Hand Speaker Microphone.
1 × English User Manual.
1 × AC Adapter.