[Red LED] We like this alarm. When we moved we left our driveway behind.. We tried 2 other alarms, but did not like them. I finally contacted the new owners to have them tell me the brand we had used before. They told us and I ordered it. It works just like it did at the old house and we like it alot.

[418 MHz] The sensor transmitter works perfectly. In my application it is about 200 feet from the receiver and there are 2 house walls in between. It was very easy to set up as per the directions. I use it to monitor my home's driveway and front entrance area. Very fast delivery from B&H and the best price I found.

[418 MHz] Ordered this product as a replacement for old failed ones. B&H had a better price than the factory and I received them in three days. They are installed and working as required. Thanks for the prompt and courteous service from B&H.

[Outdoor/Indoor] These things are the best for anywhere you want to be notified when you have some scum of the earth, like Dirtbag Tweekers, pulled into your driveway, sneeking into your yard, or even in your garage. The 3 different audible tones, offered on the in home monitor, allow you to identify what area of your property that dirtbag is in.

[IP54] This works well and is easy and flexible for setup and installation.

[Outdoor/Indoor] This transmitter is a replacement. The original lasted three years until rain got into it. It is located around 200 feet from our house. There is a forest with thick bushes between the transmitter and receiver. It is not visible from the house even in winter. It works perfectly as did the original. Shipping and delivery happened as promised by B&H. The whole Optex system has worked great.

[Outdoor/Indoor] We've been using this kit to monitor 2 entry doors to our warehouse. It was simple to setup and has been working trouble free ever since. One sensor is set up about 50 feet from the receiver behind several walls with the other receiver 250-300 feet away with metal columns and merchandise in between. We have had no signal problems and the device works as advertised.

[418 MHz] I have had these for probably 15 years, and, in today's world, I purchased more. There are three different sounds/channels. Each channel can monitor 3 sensors. One zone monitors my garage, one zone monitors my boat, and one channel monitors my parking. The parking alarm went off last month and I caught a guy in my F350 trying to steal it. The cops wouldn't come out just for that, so I chased the guy off with a shotgun. He did NOT get the truck. These saved me a ton of money just on that incident. Had not been alerted, I would have lost my truck. The same guy got my neighbor's F350 the week before. Security footage was available for both incidents.
I just changed a battery the other day. the old one was installed 6/2018. Like I said, these are great.
The only improvement I would like to see would be a Zone 1 or Zone 3 annunciator instead of the chimes. It took me a minute to wake up enough to figure out which zone the chime represented when the guy was in my truck. Had I been down there quicker I probably would have had a bloody perp for the cops to haul away. They probably would have come out for that.

[Outdoor/Indoor] The product does what it is intended to do. It works perfectly, notifying us of customers entering or exiting the business. It's use is outside so it holds up to the elements. It's reasonably priced. You won't miss any customers entering your lot or your store if you put one of these to use.

[Outdoor/Indoor] I have used these for years. They always work great, and the batteries last many years of continuous duty.
Last month alone, in the early morning, a guy broke into my SuperDuty and tried to steal it. I knew about it right away and chased him off with a shotgun BEFORE he got it. Since the cops will not do anything about him, I had to. He was the same guy who stole my neighbor's SuperDuty the week before. I know this because of everyone's surveillance cameras plainly shows the guy at work in our neighborhood. My neighbor is out his expensive truck and I am not, thanks to these little guys.