This model features an electret microphone and a stem with a flexible part near the base. It can be run on a central and/or local power supply (18 to 36 VDC). The following can be configured from the keypad: setting of the address (up to 31), priority level (up to 7), adjustment of microphone sensitivity, programming of zone keys and of the All-Call key (ALL), activation of the speech filter for improved intelligibility. FEATURES Expansion keypad for PMB112-G microphone stations, 12 programmable zone push-buttons, signalling LEDs, All-Call key. It is possible to connect up to two units in cascade fashion.