Optex RC-20U 3 Channel Receiver Chimebox w/ Relay

Purchased to notify when someone opened the front door. The alarm actually is in an adjacent building not too far away. We were concerned it would reach the distance going through 3 walls. Luckily it works fine. Simple to install and use.

Bought this to set up another chimebox in the shop at my work. Works great

does the job, Watchout for the sun.

Works excellent used for 2 outdoor areas. It must be adjusted for distance from door. A few times the dogs trip it off. Great for security.

good stuff

They work,!

Excellent product

I have three of these now...they really work great. We live at the end of the road and back up to the National Forest. I have one receiver on the upper floor, one on the basement floor, and that allows us to hear it on the main floor as well as the other two. I have two of the transmitters set up in fake bird houses along the long drive and it picks up vehicles as well as large animals. Another transmitter is mounted covering the width of the rear of the house, and this alerts us to bears on the wrap-around porch. I have this receiver and a fourth transmitter covering the access road to my shop and boat, and this is at my sisters house a mile away. You cant go wrong with these!

We own storage units and live next door. This is wired to ding whenever someone drives into the business so we can take a look at who has come onto the property. Works perfectly.

have two of the same units --so I new it was A good product