Buy new:
To see product details, add this item to your cart.
FREE Returns
Ships from: Amazon.com
Sold by: Amazon.com
To see product details, add this item to your cart. You can always remove it later.
FREE Returns
To see product details, add this item to your cart. You can always remove it later.
FREE Returns
Added to

Sorry, there was a problem.

There was an error retrieving your Wish Lists. Please try again.

Sorry, there was a problem.

List unavailable.
Other Sellers on Amazon
Added
Sold by: Home Controls, Inc.
Sold by: Home Controls, Inc.
(19294 ratings)
99% positive over last 12 months
Shipping rates and Return policy

Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm

3.9 3.9 out of 5 stars 1,000 ratings

To see product details, add this item to your cart. You can always remove it later.
FREE Returns
Available at a lower price from other sellers that may not offer free Prime shipping.

Purchase options and add-ons

Brand Safety Technology International, Inc
Power Source Corded Electric
Product Dimensions 6.6"L x 5.5"W x 10.6"H
Voltage 110 Volts
Noise Level 65 dB

About this item

  • Barking dog alarm
  • Place in any location indoors where you want to detect movement
  • Plugs into any standard electrical outlet
  • Reliable 24 hour protection
  • The closer an intruder gets the more frequent the barking
See more product details

Customer ratings by feature

Easy to install
4.5 4.5
Easy to use
3.9 3.9
Motion detection
3.8 3.8
Remote Control
3.6 3.6

Frequently bought together

$89.97
Get it as soon as Tuesday, Apr 2
In Stock
Ships from and sold by Amazon.com.
+
$58.99
Get it as soon as Monday, Apr 1
Only 9 left in stock - order soon.
Sold by SUNYOU2021 and ships from Amazon Fulfillment.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
Some of these items ship sooner than the others.
Choose items to buy together.

From the manufacturer

Rex Plus Electronic Watchdog

STI Rex Plus Electronic Watchdog

Barking Dog Alarm Helps Deter Burglars

In addition to the sound of a ferocious attack dog, Rex Plus offers the sounds of the rainforest. Choose the sound that suits you best: the continual sounds of the rainforest, or the option that allows you to use the rainforest sounds as an annunciator; the angry barking dog (for 15-20 seconds) followed by the sound of a siren or the angry barking dog that gets louder and more frequent as the intruder gets closer. Rex Plus is versatile and provides an excellent way to deter burglars, without the annoying problems of owning a real dog. With his electronic radar eyes, Rex Plus can 'see' through thick doors, walls and glass.

How Rex Plus Works

Once Rex's cord is plugged into any standard 110 VAC electrical outlet, he’ll stay on duty around the clock.

Why Rex is the Right Choice for Protection

  • Reliable 24 hour protection
  • Volume control, maintenance free
  • Very realistic - the closer an intruder gets, the more frequent the barking
  • Variable distance sensitivity (up to 30 feet), senses movement through walls, doors and glass
  • Plugs into standard 110 VAC electrical outlet, 12 VDC, 100mA
  • Four sounds: continuous rainforest, barking dog, rainforest announcing visitor, barking dog/alarm
  • Perfect for public and private buildings
Barking Watchdog Alarm

When Rex detects movement he emits the ferocious barking sounds of a large, unhappy attack dog

Barking Watchdog Alarm
Detection Efficiency

Rex Plus' radar waves can detect intruders through a wide variety of materials with varying levels of efficiency. The below will serve as a guide:

  • Glass - slight reduction in range
  • Wooden doors - slight reduction in range
  • Plaster walls - medium reduction in range
  • Metal - heavy reduction in range

Barking Watchdog Alarm

The closer an intruder gets, the more frequent the barking

Perfect for public and private buildings, Rex Plus Electronic Watchdog sounds like a ferocious attack dog, but without the maintenance. Rex Plus is versatile and provides an excellent way to deter burglars. With his electronic radar eyes, he 'sees' through thick doors, walls and glass.

Simply plug his cord into any standard 110 VAC electrical outlet, and he will stay on duty around the clock. No feeding, no walks and no naps while on guard.

Rex Plus Electronic Watchdog

Safety Technology International, Inc.

STI is a global manufacturer of protective enclosures/cages and push buttons. Our products help prevent false alarms, deter theft and minimize vandalism of fire alarm devices, communication routers and other equipment. Alarms for cabinets, extinguishers and exit doors. So much more!

Safety Technology International, Inc. We protect the things that protect you.

Product guides and documents

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Please review the User Manual for more information [PDF ]

Feedback

Safety

Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

/
/
/
/
Please sign in to provide feedback.

Looking for specific info?

Product Description

Safety Technology International, Inc. - STI ED-50 Rex Plus Electronic Watchdog Barking Dog Alarm. This electronic watchdog alarm never needs sleep, a walk, food or water; yet is always on duty guarding and protecting. Choose from four settings: continual tranquil sounds of the rainforest, alert sound of an angry and protective watchdog, soothing sounds to alert you of a guest's arrival, and alert sounds of both the angry watchdog and a warning siren. Rex Plus can see through thick doors, walls and glass. Once you plug his cord into any standard 110-VAC electrical outlet, he'll stay on duty around the clock. Place Rex Plus in any location indoors where you would like him to detect and watch him go. When there is any movement detected, Rex Plus will alert you with the sounds you have chosen. The closer the intruder, the more frequent the sounds. Ideal for homes, apartments, mobile homes, RVs, jewelry stores, hotels, public and private buildings of virtually every kind. Limited 90 day warranty. Safety Technology International, Inc. "We protect the things that protect you"

Important information

Legal Disclaimer

No paperwork

Bulb Voltage

110 volts

Customer reviews

3.9 out of 5 stars
3.9 out of 5
1,000 global ratings

Customers say

Customers like the security, ease of use, and performance of the surveillance systems. For example, they mention it's a great deterrent for intruders, and it works well as a backup. That said, opinions are mixed on detection, authenticity, sensitivity, and sound quality.

AI-generated from the text of customer reviews

244 customers mention176 positive68 negative

Customers like the performance of the surveillance systems. They say it works well, is easy to set up, and works as a backup for their security system. Some mention that the price is a little high, but it's well worth it since it gets the job done.

"...You set it up based on where you want it to detect and it works great. I've been around others that get set off in unpredictable ways...." Read more

"...fine tuning to get Rex to bark at the appropriate time, but it actually worked perfectly. Her neighbors wanted to meet her new dog...." Read more

"...AND of the 4 settings, only 3 work. The setting with dog bark plus siren does not work...." Read more

"Have owned REX for approximately 3 years and it has worked flawlessly...." Read more

49 customers mention44 positive5 negative

Customers like the security of the product. They say it makes them feel safe, serves the purpose for protection, and is a great deterrent for intruders. Some say that it doubles as a second security system and keeps invaders away.

"...With a bit of patience and testing, I believe Rex is a wonderful tool for home security...." Read more

"...Other than that, the unit seems well built and the bark sound is very realistic to my ears...." Read more

"...think Rex is a good solution for my situation and also doubles as a second security system." Read more

"This product works as described and does serve effectively as either an alerting device to let you know someone is approaching the door, or as a..." Read more

37 customers mention30 positive7 negative

Customers find the surveillance system easy to use and setup. They mention it's simple and effective. Some say that the unit of volume and sensitivity are easy to set. Overall, most are satisfied with the product's ease of use.

"I have now purchased three of these dogs. Rex is the easiest keeper you'll ever have...." Read more

"...now i am so relieved i did. it is easy to set up & it does what it advertises to do...." Read more

"...I like it very much so far. Easy to set up and worked right away." Read more

"...but the steel wool works good enough for me and was super easy to implement...." Read more

258 customers mention116 positive142 negative

Customers are mixed about the sound quality of the surveillance system. Some mention that the bark sound is very realistic, and the volume of bark is perfect. They also say that the sound is menacing and convincing when it is only somewhat audible from outside. However, other customers say that it goes crazy barking, and that the sluggish-sounding bark is fake.

"...Nothing fancy here. It just works and sounds great. If you need the realistic sound of a dog barking, this is your device...." Read more

"...As soon as you manually turn it on it starts barking, which is annoying. A remote mute feature would be a nice thing to have." Read more

"...Rex" sounds so real, my alarm once went off in the middle of the night, triggering the police...." Read more

"...Finally, the sound reproduction is too quiet and so poor that it’s obviously a cheap speaker. Only a high end speaker can produce realistic sounds...." Read more

94 customers mention50 positive44 negative

Customers are mixed about the sensitivity of the surveillance system. Some mention that it does sense movement very well, even through concrete walls. The sensitivity is adjustable, and the unit responds adequately to anyone approaching. However, others say that the senity range could be improved, and that it lacks sensitivity.

"...Rex" detects motion up to 26 feet and it is also very sensitive, which you can adjust. But this goes both ways, as "Rex" will bark at you too!..." Read more

"...And yes, it senses motion from all sides, so perhaps placing some metal shielding may reduce triggering it accidentally..." Read more

"...But, I guess it is. The motion is sensitive enough to go through my metal back door...." Read more

"I had great hopes for this device but unfortunately it is VERY tricky to set the sensitivity...." Read more

43 customers mention23 positive20 negative

Customers are mixed about the authenticity of the product. Some mention that it sounds realistic and life-like, while others say that it's not realistic. The unit has additional barking patterns for more realism, but some customers say it'll let them know the dog is fake.

"...The single bark (distance) and the three barks (closer) are very realistic and you'd swear there was a Shepard behind the door...." Read more

"...a large dog half asleep, half-interested, and with an obvious tinny, phony, metallic sound. He was sent back for a replacement...." Read more

"...We're still working on it though. Baritone bark is very impressive!..." Read more

"...you hear buzzing due to this engineering failure, and it lets you know the dog is fake...." Read more

30 customers mention15 positive15 negative

Customers are mixed about the detection of the surveillance system. Some mention that it works through walls and is easy to set up, while others say that it won't detect through a brick wall.

"...As for the sensors, they are top notch though and work through aluminum framed doors extremely well...." Read more

"...This device could hardly detect anything through my walls...." Read more

"...It seems to be able to detect you through the walls.Or it woofs intermittently to give the impression there’s a real dog inside...." Read more

"...Sensitivity through a wooden door is pretty good. Will not detect through a brick wall. Still detects movement from behind...." Read more

57 customers mention13 positive44 negative

Customers are dissatisfied with the value of the surveillance system. They mention that it's a waste of good money, useless, and a relatively high price. Some customers also mention that the speaker is too quiet and poor.

"...Finally, the sound reproduction is too quiet and so poor that it’s obviously a cheap speaker. Only a high end speaker can produce realistic sounds...." Read more

"...I may just return it. It's a waste." Read more

"...one's bark was sluggish-sounding, like a large dog half asleep, half-interested, and with an obvious tinny, phony, metallic sound...." Read more

"...The price is worth it if it prevents just one break-in...." Read more

Really Effective Barking dog Security system!
5 Stars
Really Effective Barking dog Security system!
This is a wonderful first line of security. I’ve added a dog bed, dog dish, & doggy toys to get full effect of a German shepherd in my home! Once I found the best location & range I needed it’s great when I open my front door & it even picks up motion at front windows when my gardener is racking too close to front of house. It’s great!
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on June 11, 2023
13 people found this helpful
Report
Reviewed in the United States on January 13, 2024
2 people found this helpful
Report
Reviewed in the United States on March 7, 2024
Reviewed in the United States on October 26, 2023
7 people found this helpful
Report
Reviewed in the United States on December 27, 2015
9 people found this helpful
Report

Top reviews from other countries

Translate all reviews to English
Carlos H.
2.0 out of 5 stars Sensibilidade
Reviewed in Mexico on December 6, 2019
hp
5.0 out of 5 stars Five Stars
Reviewed in Canada on December 7, 2017
Mihai Szornyi
2.0 out of 5 stars Great idea however the finished product does not work as described.
Reviewed in Canada on November 20, 2023
Rejeanne Breton
1.0 out of 5 stars Rex electronic watchdog, Barking Dog Alarm.
Reviewed in Canada on June 4, 2023
One person found this helpful
Report