Classic pass-through letterbox for the in-home bus with stainless steel front, V4A brushed. Only for mounting on existing flush-mounted housings from the TL 411 series. , Components:, . Door loudspeaker CBTLE 050-. with integrated loudspeaker and microphone, voice volume adjustable, . 2 call buttons with backlit nameplate, replaceable on the front, acoustic feedback can be activated when a call button is pressed, . 2 letter slots with handle bar
