The Peltor DectCom II Combined Base & Handset connects wirelessly to the base unit for conference facility with other people connected. - Base unit for up to 9 simultaneous speakers in a full duplex conference - The DECT-Com II conference can also have an additional number of listeners, all with possibility to enter as speakers in the conference, at any time. - Two more separate conference groups on this same base. (Requires software programming.) - Depending on start up sequence this unit can be used as either base or portable. - Headsets with different types of microphones can be used. A headset can be connected also when this unit is used as a base. - Full duplex communication, but with "VOX", for preventing from transmitting background noise to the conference. - An "all call" function makes it possible to communicate common messages (simplex) to all users in all groups, at the same time. - As a fixed installed base, the unit is normally power supplied in a special holder with AC