The HCS-5391CE chairman unit with Innovative and minimalist design has all the necessary facilities to enable the user to chair a conference. Similar in appearance and function to HCS-5391DE Delegate Unit, the HCS-5391CE Chairman Unit includes an extra microphone priority button. When pressed, the priority button causes all currently active microphones to be switched off temporarily or permanently, allowing the chairman to take control of the meeting. Separate rechargeable Lithium battery packs can be removed and replaced in a matter of seconds, providing maximum flexibility in recharge scheduling.