4P4C Headset Training Adapter Training Switch Adapter for RJ9 RJ10 Headsets with 2 Mute Buttons and 2 Volume Controls

Volume Control Separately.
Easy setup Y training adapter splitter that you can plug into either the telephone handset port or headset port and the adapter splitter will give you two more ports to headset or handset corded plug in. Now both users can simultaneous listening / talking, mute when need, into one conversion via this adapter.
TWO Volume Controls and Mute Switch for Microphone Separately
Can plug either into handset port or headset port
Great use for call center / telephone marketing trainings
Easy setup, plug and play