zwirble1787 wrote:I have a low battery message on my front door. How do I change the battery? i was nver given any manuals.
HI zwirble1787!
When the cover is removed from the Visonic MCT-320 SMA door/window sensor, the battery comparment is inside the cover. I'm attaching the manufacturer's guide to your specific sensor, so this can help you in the future. I apologize that you weren't left any instructions when your install took place.