Optex TD-20U Indoor/Outdoor Wireless Infrared Transmitter

This product works properly and is exactly as described

It works . . . BUT you have to VERY CAREFULLY position it and test it to get exactly what you want. But it does work nicely once it's properly set up. It woke us up at 4:30 a.m. and we found 3 illegal mexicans trying to steal tools out of my truck and two motorcycles. If not for this going off we would have had no idea that the illegal mexicans were out there trying to steal everything they could get their hands on. Since we have put up the alarms we keep finding illegal mexicans breaking in. We have one or two come by, seen with handguns, who find the targets to steal from. Several nights later two or three come by prepared for the locks and security you installed. LAPD does not respond or arrest illegal mexicans and warn if you call in not to interfere with the crime. These sensors have been hard to find when placed in the area, don’t make any sound in the area and gives you a heads up to call police, just not LAPD. We have a parking area that is too far for Wifi to connect reliably so it is difficult to use cameras and alarms that utilize WiFi

We have had this brand/system for years, then one sensor was accidentally damaged beyond repair. We bought a replacement unit, not sure if new would be compatible with the old. It did! Followed instructions and “taught” it to recognize old/main system. In fact, it was so easy that we purchased another one to expand the surveilled area. We love it!

PERFECT FOR MY DRIVE-THRU RESTAURANT.DURABLE. THE FIRST ONE I BOUGHT LASTED 15 YEARS, I HAD TO REPLACE IT WITH ANOTHER SIMILAR ONE BECAUSE THE HINGE WAS BROKEN ON THE OLD ONE.RECOMMEND IT.

Bought as a second motion detector for my yard. Works great.