Sennheiser Passive box headset swith

The UI box works as a connector between your handset and headset. At the touch of a button a passive box will enable you to easily switch back and forth between the handset and headset or even integrate a PC into the system if you wish.
You can choose an active box with additional features that will regulate different volume levels and improve speech intelligibility - automatically. These boxes are absolutely user-friendly because they are easy to set up than traditional boxes.
Features:
The ultra-compact UI 710 allows you the comfort of quickly switching between using the headset or the telephone handset