Bosch Voice Alarm Keypad

The Bosch LBB1957/00 Plena Voice Alarm Keypad is an advanced zone expansion keypad for the LBB1956/00 Call Station, adding seven extra zone selection keys with LED indicators. Designed for professional PA and voice alarm systems, it supports up to eight linked keypads and offers reliable, user-friendly control for airports, malls, schools, and public buildings.