The CP-222 is a 2-channel wireless BeltStation that operates in conjunction with the CM-222 or CM-244 Tempest2400 BaseStations. There are 3 modes of operation for a BeltStation - Normal, Split and Shared. By switching to Shared or Split Mode, an unlimited number of BeltStations can be registered to each BaseStation using shared resources. Each BeltStation user may simultaneously Talk/Listen on A and B or toggle between A and B in "Single Listen" mode. Volume is set by rotating the CH A or CH B rotary control.