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

Got it for work, and it works great.

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

We use these to signal that help is needed in different rooms in our facility, they always work well. The manufacturer was quick to give advice on a technical question too.

put it by your driveway, back doors, near your car in the driveway and it will wake you up in the night to let you know something is moving around nearby. The batteries in the outdoor sensor last well over a year, though out all temps.

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!

Difficult company to work with and impossible to return unwanted item.

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.

This system alarms every time the sun comes up, or goes down, and every time a cloud goes past the sun. Also, as the sun moves, the shadows cast by tall trees on the driveway trips the alarm. So on a intermittent cloudy day the two transmitters that I have are tripped almost continuously all day long. OptexAmerica says they are aware of the problem but have no solution. To be clear, it is not the sun hitting the transmitters, it is the general sunlight changing on the driveway surface. This system might work well indoors, but not anywhere thats sunny! Hard to believe, I agree! Works well at night.

does the job, Watchout for the sun.

Easy to set up and very effective.