Classic door station for the in-home bus with stainless steel front, V4A brushed. The flush-mounted housing GU CL 04-0 is required for flush-mounting. Components: . Door loudspeaker CBTLE 050-. with integrated loudspeaker and microphone, voice volume adjustable . 4 call buttons with backlit nameplate, replaceable on the front, acoustic feedback can be activated when a call button is pressed