The BOSCH PLE1CS Plena call station paging microphone is a stylish design high-quality call station with a stable metal base, a flexible microphone stem, and a unidirectional condenser microphone. The LBB1956/00 can make calls to selected zones (one to six and all-call) in a public address system built with the Plena Voice Alarm System. In addition to tabletop use, the special design allows it to be neatly flush-mounted on desktops. Stylish six-zone call station for the Plena Voice Alarm System Uni-directional condenser mic on a flexible stem Six zone selection keys, all-call key, and momentary PTT-key for calls Selectable gain, speech filter, limiter, and output level for improved intelligibility LED indications for zone selection, fault, and emergency state Call station extension provides seven additional zone and zone group keys Allows connection of expansion keypad LBB1957