The new BZ-3 Ceiling Bezel is designed to accept various Multi Capsule Ceiling Microphones such as; The Polycom HDX - ClearOne Ceiling Microphone Array - Audix M3 or other larger microphone. This Bezel also provides a new function that permits a final trim of the microphone when retracted inside the bezel. This adjustment trim can be performed from inside the room – using the "Hook" adjustment tool as shown below. Deploy the microphone out of the way, push the guide up to reveal the adjustment slot; engage the hook end into the limit switch carrier; push up to allow the microphone more entry or pull the carrier down to stop the microphone sooner. Try small increments until desired docking is achieved.<p>The hole size for the BZ-3 is 2.625" Pushing the bezel firmly against the ceiling from inside the room, slide the clamp down - tightly against the ceiling material; tightening the clamp to the Bezel then carefully tighten the two Jack Screws to remove any slack remaining by pulling the Bezel tightly against the inside ceiling.<p>NOTE-1: The white bezel slide/magnet carrier is stored inside the BZ-3 body for shipping. It is retained at the Flange end by  a retaining ring, but can slide out the top. NOTE: Please take care when unpacking not to let the White Slide-Guide fall out and possibly be damaged. Prior to assembly as shown above, insert the Microphone followed by the magnet carrier into the top of the bezel making sure that it is free to move inside the bore. Clean the bore to remove any debris.<p>NOTE-2: If the white slide is not free to move inside the bezel bore, if possible eliminate any dents, adhesive or other foreign material impeding smooth movement. If the guide is damaged, please call for a free replacement.<p>