- Headset Amplifier And Interface Module
- Provides Headset Interface For Phone Without A Headset Jack
- Adjustable Amplification Of Headset Transmit And Receive
- Powered By 12v Power Supply (included) Or 2 Aa Batteries (optional)
- Headset On/off Button
- Mute Button
- Headset Volume Control
- Inuse Indicator Led
- 3 Rj11 Ports For Headset Telephone Handset And Telephone
- Brand: Cortelco
