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🚪 Stop intruders before they step in — loud, tough, and reliable!
The STI 6400 Exit Stopper is a multifunction door alarm designed to prevent unauthorized exits and entries through emergency doors. Featuring a highly visible stop sign design and a powerful 105 dB alarm, it offers multiple alert modes and a key-operated override for authorized access. Its virtually indestructible polycarbonate housing and long-life 9V battery ensure durability and reliability, backed by a 3-year guarantee on the housing. Easy to install on nearly any door, this alarm is a cost-effective security solution trusted by professionals.







| ASIN | B0006AZDII |
| ASIN | B0006AZDII |
| Audible Noise | 105 Decibels |
| Batteries | 1 9V batteries required. (included) |
| Battery Description | Alkaline |
| Best Sellers Rank | #30,070 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #40 in Home Alarm Systems |
| Brand | STI |
| Built-In Media | 9V Battery, Door Alarm, Reed/Magnet |
| Color | Red |
| Control Method | Touch |
| Customer Reviews | 4.6 4.6 out of 5 stars (491) |
| Customer reviews | 4.6 4.6 out of 5 stars (491) |
| Date First Available | 11 August 2012 |
| Department | Safety Hardware |
| EU Spare Part Availability Duration | 3 Years |
| Global Trade Identification Number | 00662950640004 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions L x W x H | 17.3L x 6.9W x 1H centimeters |
| Item Type Name | Door Alarm |
| Item Weight | 1.15 Pounds |
| Item model number | STI-6400 |
| Manufacturer | Safety Technology Intl |
| Manufacturer | Safety Technology Intl |
| Mounting Type | Door Mount |
| Number of Batteries | 1 9V batteries required. (included) |
| Power Source | Battery Powered |
| Product Dimensions | 6.8 x 2.7 x 0.01 cm; 521.63 g |
| Sensor Technology | Contact Sensor |
| UPC | 737214686613 662950640011 662950640004 |
| Unit Count | 1 Count |
| Voltage | 9 Volts |
S**H
Good Quality Product
Good Quality Product
J**T
Sold as advertised A+
J**R
I meant to take pics and forgot. First it's much SMALLER than I thought - you know it "looked bigger in the picture". However this little thing is much louder than the one we were replacing. Upside it uses a standard 9v battery so no weird battery combos. We used this on an metal emergency exit in a retail space that was about 120' from the cash registers. Now everyone can hear if someone tries to slip out that door into the parking lot. It has an internal reed/magnet setup that works like a lego block and can be moved around the inside of the unit to wherever the magnet contact is on the door. My only suggestion - the screws are pretty much for a wood door setup so save a headache and grad some self-tapping metal screws if using on a metal door and/or door jamb. Happy so far but it's only been installed a few days. I would only update this if it dies in the first year based on the price alone.
R**A
التوصيل كان سريع والشحنة مناسبة للعمل وذات جودة ممتازه
R**N
Exactly what I wanted. Can't buy a better door alarm for this price level. Was easy to install and works perfectly. Lots of adjustable options. Works well for restaurant emergency exit door.
J**R
Muy útil
Trustpilot
1 month ago
3 days ago