Used with Qwikbus Type S.T.R. 2 / 4 Wire 'Bus' Stations Only and Modular Style Panel(S). The BLM333 series speaker/microphones are designed to be used only with Alpha Communications® / S.T.R.™ QwikBUS™ modular series door entry stations.
The BLM333 series is used with the 2-wire (loop) type QwikBUS™ apartment handset intercom stations, open voice apartment intercom stations and/or video monitor stations with handsets or open voice style.
All BLM333 speaker/microphone modules feature a weather-resistant speaker, long-life electret condenser microphone, illuminated dry-contact low voltage light push button and plug-in connector for easy wiring.
All BLM333 speaker/microphone modules are 3.94"w x 3.94"h (100mm x 100mm), and are made to snap into the MT series modular panel trim frame(s).
To service the BLM333 series modules, once installed, use the model 13510 key / tool unit.
When calling more than four (4) inside QwikBUS™ video monitor stations at one time, add the Suffix -8 to the model# shown, for a different version of this speaker / microphone module that allows calling up to eight (8) video monitors from a single call button.
