--- product_id: 1258794 title: "Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm" brand: "sti" price: "B/.332" currency: PAB in_stock: true category: "Sti" url: https://www.desertcart.com.pa/products/1258794-safety-technology-international-inc-ed-50-rex-plus-electronic-watchdog store_origin: PA region: Panama --- # 110V plug-in power Ultrasonic motion sensor 65 dB audible alert Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm **Brand:** sti **Price:** B/.332 **Availability:** ✅ In Stock ## Summary > 🐕‍🦺 Your 24/7 digital watchdog—because peace of mind never takes a break. ## Quick Answers - **What is this?** Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm by sti - **How much does it cost?** B/.332 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/1258794-safety-technology-international-inc-ed-50-rex-plus-electronic-watchdog) ## Best For - sti enthusiasts ## Why This Product - Trusted sti brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Security:** Simply plug into any standard outlet and instantly secure your space without complicated setup. - • **Multi-Mode Alert System:** Choose from soothing rainforest sounds to aggressive barking and sirens for tailored security. - • **24/7 Vigilant Protection:** Never sleeps, never rests—your round-the-clock electronic watchdog. - • **Penetrates Walls & Glass:** Ultrasonic sensor detects movement through thick doors and barriers—no blind spots. - • **Dynamic Intruder Response:** The closer the threat, the more frequent the bark—escalating alerts to keep you ahead. ## Overview The STI ED-50 Rex Plus is a compact, plug-in electronic watchdog alarm featuring a 65 dB ultrasonic motion sensor that detects movement through walls and glass. It offers four customizable sound modes—from tranquil rainforest ambiance to aggressive barking and sirens—providing continuous, reliable indoor security powered by a standard 110V outlet. Ideal for homes and businesses seeking hassle-free, around-the-clock intrusion alerts. ## Description 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" From the Manufacturer Rex Plus is the electronic watchdog that never sleeps and the soothing sounds of the rainforest! 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 feets arrival, and alert sounds of both the angry watchdog and a warning siren. Rex Plus can inchessee inches through thick doors, walls and glass. Once you plug his cord into any standard 110-VAC electrical outlet, he feetll stay on duty around the clock. Ideal for homes, apartments, mobile homes, RVs, jewelry stores, hotels, public and private buildings of virtually every kind. ## Features - 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002XITC5G | | Audible Noise | 65 db | | Best Sellers Rank | #122,274 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #131 in Smoke Detectors & Fire Alarms | | Brand | STI | | Built-In Media | Barking Dog Alarm,Audible/Annunciation | | Color | Light Blue | | Compatible Devices | Smartphone | | Control Method | Touch | | Customer Reviews | 3.9 3.9 out of 5 stars (1,063) | | Global Trade Identification Number | 00750215330019 | | Item Dimensions L x W x H | 6.6"L x 5.5"W x 10.6"H | | Item Weight | 12.32 ounces | | Manufacturer | Safety Technology Intl | | Manufacturer Warranty Description | Limited 90 day warranty. | | Mfr Part Number | ED-50 | | Model Number | ED-50 | | Mounting Type | Floor Mount | | Number of Items | 1 | | Power Source | Corded Electric | | Sensor Technology | Ultrasonic Sensor | | Size | 1 | | UPC | 783961712341 750215330019 | | Unit Count | 12 Ounce | | Voltage | 110 volts | ## Product Details - **Brand:** STI - **Color:** Light Blue - **Compatible Devices:** Smartphone - **Power Source:** Corded Electric - **Product Dimensions:** 6.6"L x 5.5"W x 10.6"H ## Images ![Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm - Image 1](https://m.media-amazon.com/images/I/714OBVZU9cL.jpg) ![Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm - Image 2](https://m.media-amazon.com/images/I/51a7HCS3ybL.jpg) ![Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm - Image 3](https://m.media-amazon.com/images/I/61+U1orakAL.jpg) ## Questions & Answers **Q: Stupid question: if I set it by the front door and then walk out the front door to leave, won't I set it off?** A: Yes. But it will stop when you are out of range. We just say as loud as we can, KILLER SHUT UP WELL BE BACK SOON! :-) **Q: My front door which I want to guard is made of steel/aluminum. Would it work sensing anyone that approaches my door from the outside?** A: Mine does not work through my metal door, but it also has to go through the storm door also. It does work through walls and ceilings. **Q: Is there a way to remotely "disarm" it (e.g. cell phone app)?** A: Devices like Wemo are now widely available, fairly cheap, connect to the internet through one's home router & can so be controlled by Amazon Electra or a cell phone app. It should now be quite easy to interface one with a device like Rex Plus Barking Dog Alarm, to turn the speaker of f& on remotely. **Q: what does the bark sound like? Can we hear a sample?** A: The sound is a vicious German Shepard barking...I don't have the sound for you to hear it. So sorry! ## Frequently Bought Together - Safety Technology International, Inc. ED-50 Rex Plus Electronic Watchdog, Barking Dog Alarm - FakeTV - FTV-11 - Advanced Burglar Deterrent Device – Widescreen Realistic Television Simulator with Reflective Lens - Dummy Home Security Device with Lights – Protect Your House & Valuables - FakeTV - FTV-10 Charcoal Design Burglar Deterrent – Simulated TV Light with Frosted Lens – Energy-Efficient LED Dummy Home Security Technology – Prime Quality House & Valuables Protection Equipment --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.pa/products/1258794-safety-technology-international-inc-ed-50-rex-plus-electronic-watchdog](https://www.desertcart.com.pa/products/1258794-safety-technology-international-inc-ed-50-rex-plus-electronic-watchdog) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-10-11*