Key Features
1. Professional Call Center Headset Amplifier for Multi Line Phone
2. 12 Combinations for compatibility of Almost All Phone System in the World
3. Mute and Volume Control of Microphone
4. Speaker Volume Control
5. Push Button Type Mute Function, Slide Switch type On/Off Function
6. High Performance, Durable Modular Phone Jack to Help Eliminate Static
7. Headset Hanger Included, Professional Headset is Optional
