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?

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! :-)

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?

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.

Is there a way to remotely "disarm" it (e.g. cell phone app)?

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.

what does the bark sound like? Can we hear a sample?

The sound is a vicious German Shepard barking...I don't have the sound for you to hear it. So sorry!

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

Product ID: 1258794

Details

Brand
STI
Color
Light Blue
Compatible Devices
Smartphone
Power Source
Corded
Product Dimensions
6.6"L x 5.5"W

⚡24/7 continuous power via 110V outlet

🔊65 dB audible bark alarm

🛡️Ultrasonic sensor detects through walls

38160 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🐕‍🦺 Your tireless electronic watchdog—always alert, never tired.

DYNAMIC ALARM FREQUENCY - The closer the intruder, the more frequent the bark—escalating your awareness in real time.
MULTI MODE ALERT SYSTEM - Choose from four distinct sound modes—from soothing rainforest ambiance to aggressive watchdog barks with siren.
STEALTHY INTRUDER DETECTION - Ultrasonic sensor penetrates walls, doors, and glass to catch movement before it’s too late.
UNSTOPPABLE 24 7 PROTECTION - Plug in once and enjoy round-the-clock security without breaks or downtime.
EFFORTLESS SETUP VERSATILITY - Simply plug into any standard outlet and place indoors—perfect for homes, offices, RVs, and retail spaces.

The STI ED-50 Rex Plus is a plug-in electronic watchdog alarm featuring a 65 dB barking sound and ultrasonic motion detection that works through walls and glass. It offers four sound modes including protective barks and soothing rainforest sounds, providing continuous 24/7 indoor security ideal for homes and businesses. Compact and easy to install, it dynamically increases alarm frequency as intruders approach, backed by a limited 90-day warranty.

Specifications

ASIN	B002XITC5G
Audible Noise	65 db
Best Sellers Rank	#163,544 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #143 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 (1,064)
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	1 Count
Voltage	110 volts

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