Motion Activated Entrance Alert Sends Signal up to 1,000 Ft. by Safeguard Supply


The LRA-MSTX is an indoor rated passive infrared sensor for use with the LRA series of products. Great for businesses, this sensor will transmit a wireless signal up to 1,000 to a compatible LRA receiver.

SKU: LRA-MSTX Category:

More Info...

Download user manualGTIN: 635963263560

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Accessories & Addons

State-of-the-art indoor passive infrared (PIR) motion sensor used to detect entrance into a facility.  Works great in areas where interference from metal or concrete may interfere with magnetic door/window contact. This sensor is triggered with a combination of heat and movement detected by the sensor.   When triggered, the sensor will transmit a wireless signal to compatible receivers in the LRA series such as the LRA-DCRX Strobe Receiver, LRA-VPRX Portable Receiver that Vibrates, and the new arrivals by Safeguard Supply, the LRA-DCRXS Plug-in Strobe Receiver, and the LRA-DCRXA Battery Operated Receiver.

Product Features

  • Small, compact unit: dimensions: 3.56”(H) x 1.93”(D) x 2.48” (W)
  • Powered by  a Powerful, long-lasting CR123a Lithium battery (included)
  • Passive infrared sensor detects movement and heat
  • Detects motion up to 20 ft. at /- 30 degrees
  • Transmits signal up to 1000 feet (line of sight) to a compatible receiver such as the LRA-DCRX and LRA-VPRX.
  • Manufactured by Safeguard Supply
  • 1 Year Manufacturer’s Warranty
Weight 0.8 lbs
Dimensions 1 × 2 × 2 in



Safeguard Supply

Wireless Range

1000 ft.


1 Year

Wireless Features

Expandable, Multi-Zone


Safeguard Supply – LRA Series

Kit Or Accessory

Transmitter Only

Customer Reviews

Based on 248 reviews
P.H. (South Lake Tahoe, US)
Best Doorbell Ever

I had complications with my first order. A phone call to the company resulted in a prompt exchange of equipment, including programming of my receivers by the company. This excellent service has enabled me (a person with profound hearing loss) to have security in my home with an adequate doorbell system. Thank You!!

B.R. (Ashburn, US)
Superior customer service

I ordered some add-on ringers for a system purchased a few years ago, without noticing that there had been a change which caused a compatibility issue. When I realized my mistake and called, they were as helpful as could be, sending compatible units and including a return label for the incompatible ones. Everything works perfectly, and they made it easy.

P.G. (Boynton Beach, US)
Remote relay

I used the doorbell as a remote relay triggered by the push button. The relay activated a vintage chime doorbell. Tech support was excellent and relay worked perfectly.

Thanks for the review! We're glad to hear that the relay worked perfectly and that the tech support was excellent.

R. (Pella, US)

Super easy install! Works as expected. Great product!

Anonymous (Lathrop, US)
Door Bell Alert with flashing light

This is a remote door bell with the options to have loud sound, flashing light or both. My folks are Deaf so this works well for them. It worked great then all of a sudden it stopped. There is a one year warranty. I reached out and the customer service rep responded very quickly and tried thier best to trouble shoot. After trying all that they could they sent us a new unit. The device works great, and the customer service was great as well.

Thank you for your review. We are glad to hear that the Door Bell Alert with flashing light is working well for your family. We are sorry to hear that the device stopped working suddenly, but we are glad that the customer service was able to help troubleshoot the issue.

K.F. (Clearwater, US)

When I first got door bell, I had problems with it, continuing blinking after bell was rung. He adapter that was sent fixed the problem. It’s a great doorbell, and I would buy it again!

R.W. (Knoxville, US)

The handling of my order was very efficient and timely. Chimes are exactly as I expected.

Thanks for the review! We're glad you're happy with your purchase.

S.G. (Cuyahoga Falls, US)
This product was super easy to install. It works great by extending my front door bell to hear i...

Excellent product and super easy to install. I reached out to customer service with a question. They were knowledgeable, friendly and very helpful with my order and even went the extra mile to send me an email with step by step instructions to install and pair up the receiver to the transmitter. Excellent experience from purchasing to owning. Marilee C. was the customer service person I worked with. She was awesome. Thank you.

P.R. (Indianapolis, US)


B.N. (Kingman, US)
Door bell extender.

Bought 2 receivers and transmitter for front door. Both work great so far.

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