1 Button. The Videx 8836M speaker panel is part of the 8000 series and available in a choice of push button numbers. All modules have illuminated name windows and contain a replaceable insert for displaying flat numbers or names. They contain a speaker and fly lead with microphone which is easily fitted in to a 8000 series frame. The modules slide in to the housing frames to secure them.. Available with 0, 1 or 2 call push button. Suits 3+1 - 8K kit module. Speech volume adjustment (both directions). Lock output: Dry contact NO & C