8836-1. The Videx 8836-1 1 button speaker microphone unit is an updated version of the similar 800 series units. It incorporates improved weather sealing and electronics to withstand even the harshest of environments. The 8836-1 modules will fit both the Videx 800 & 8000 series housings.. Speaker microphone unit. 1 button. Improved weather sealing and electronics to withstand harsh environments. To suit 800 and 8000 series housings