Safety Technology International, Inc. STI-6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/Off Switch and 9 Volt Battery, red
Safety Technology International, Inc. STI-6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/Off Switch and 9 Volt Battery, red
Couldn't load pickup availability
- 24/7 Customer Support
- Risk-Free 30-Day Returns
- Fast & Reliable U.S. Shipping
Contact Information
Contact Information
30-Day Hassle-Free Returns
30-Day Hassle-Free Returns
Not satisfied? Return your order within 30 days for a full refund or exchange — simple and easy.
✔ Easy return process
✔ Fast refunds
✔ No hidden conditions
Fast U.S. Shipping
Fast U.S. Shipping
We ship within the United States only — no international delays.
✔ Processing time: 1–2 business days
✔ Delivery time: 3–7 business days
✔ Real-time tracking available
👉 Track your order anytime from the header via Track Order
About This
- Alarm alerts to unauthorized exits or entries through protected doors
- Unit is completely self-contained and easy to install
- Sounds a powerful 95 or 105 db alarm when Activated
- May be mounted on top, right, left or next to almost any door
- Dimensions - 5 in. diameter x 1.875 in. depth
Overview
- Color : red
- Brand : STI
- Power Source : Battery Powered
- Product Dimensions : 5.38"L x 5.38"W x 2"H
- Battery Description : Alkaline
WE MAKE SMART LIVING SIMPLE.
OUR TEAM HELPS SECURE YOUR HOME.
SmartHomeValueHub helps homeowners create safer, smarter, and more convenient living spaces with trusted smart home solutions built for everyday life.
From smart security cameras and smart locks to video doorbells, thermostats, lighting, and home automation essentials — we focus on products that improve real comfort, safety, and efficiency.
Our goal is simple: better protection, lower energy costs, and smarter daily living for every home.
Why Homeowners Trust SmartHomeValueHub
✔ Easy Setup
✔ Matter Compatible
✔ Smart Security
✔ Energy Saving
50K
HaSMART DEVICES INSTALLEDppy Clients
15+
YEARS OF SMART HOME EXPERTISE
98%
CUSTOMER SATISFACTION RATE
365
RELIABLE SUPPORT YEAR-ROUND
Smarter Security. Lower Bills. Easier Living.
SMART HOME FAQ
Yes — many modern devices support multiple platforms.
Matter-certified devices can work across Alexa, Google Home, and Apple HomeKit at the same time.
Not always.
Smart bulbs, plugs, cameras, and video doorbells are often easy DIY installations, while full security systems may need professional setup.
Many devices still work manually or through local control.
You may lose remote app access, but locks, lights, and thermostats often continue basic functions.
Security depends on the device and setup.
Use strong passwords, trusted brands, firmware updates, and secure Wi-Fi for better protection. Privacy and unauthorized access are common concerns in smart homes.
Most homeowners start with:
Smart Security Cameras
Smart Door Locks
Smart Thermostats
Smart Plugs
Video Doorbells
Yes.
Smart thermostats and smart plugs help reduce wasted energy by automating heating, cooling, and power usage.
It depends on your ecosystem.
Alexa → widest compatibility
Google Home → strong for Android users
Apple HomeKit → best privacy
Home Assistant → advanced control
Smart Home Tips, Trends & Buying Guides
-
How to Choose the Best Smart Lighting for Every...
Choosing the right smart lighting can improve comfort, convenience, ambiance, and energy efficiency throughout your home. This 2026 guide explains how to select smart bulbs, LED strip lights, and connected...
How to Choose the Best Smart Lighting for Every...
Choosing the right smart lighting can improve comfort, convenience, ambiance, and energy efficiency throughout your home. This 2026 guide explains how to select smart bulbs, LED strip lights, and connected...
-
How to Choose the Best Smart Home Hub: Alexa vs...
Choosing the right smart home hub determines how easily your devices connect, automate, and work together. This 2026 guide compares Alexa, Google Home, and Apple Home across compatibility, voice control,...
How to Choose the Best Smart Home Hub: Alexa vs...
Choosing the right smart home hub determines how easily your devices connect, automate, and work together. This 2026 guide compares Alexa, Google Home, and Apple Home across compatibility, voice control,...
-
How Smart Home Sensors Can Make Your Home Safer...
Smart home sensors are transforming the way homeowners protect and manage their homes. From detecting motion and water leaks to monitoring indoor air quality, temperature, and entry points, connected sensors...
How Smart Home Sensors Can Make Your Home Safer...
Smart home sensors are transforming the way homeowners protect and manage their homes. From detecting motion and water leaks to monitoring indoor air quality, temperature, and entry points, connected sensors...
