--- product_id: 337488095 title: "Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors" brand: "sti" price: "905.83 DT" currency: TND in_stock: true reviews_count: 5 category: "Sti" url: https://www.desertcart.tn/products/337488095-safety-technology-international-inc-sti-6400-exit-stopper-multifunction-door store_origin: TN region: Tunisia --- # 105 dB piercing alarm Long-life 9V alkaline battery Virtually indestructible polycarbonate Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors **Brand:** sti **Price:** 905.83 DT **Availability:** ✅ In Stock ## Summary > 🚪🔒 Stop exits before they happen — security that speaks volumes! ## Quick Answers - **What is this?** Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors by sti - **How much does it cost?** 905.83 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/337488095-safety-technology-international-inc-sti-6400-exit-stopper-multifunction-door) ## 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 - • **Customizable Alarm Duration:** Choose from 30 seconds, 3 minutes, or continuous alarm to fit your security needs perfectly. - • **Stop Unauthorized Access Instantly:** 105 dB alarm grabs attention in seconds, deterring intruders and preventing unauthorized exits. - • **Battery Powered for True Portability:** Runs on a long-life 9V alkaline battery, ensuring reliable security without wiring hassles. - • **Built to Withstand the Toughest Conditions:** Polycarbonate housing offers near-indestructible protection backed by a 3-year breakage guarantee. - • **Effortless Installation & Versatile Mounting:** Mounts easily on almost any door—top, side, or next to the door—for seamless integration. ## Overview 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 customizable alarm durations and a key-operated override for authorized access. Its virtually indestructible polycarbonate housing is backed by a 3-year guarantee, and it runs on a long-life 9V alkaline battery for easy, wire-free installation on almost any door. ## Description Safety Technology International, Inc. - STI 6400 Exit Stopper Multifunction Door Alarm. Helps prevent unauthorized exits or entries through emergency doors. If the protected door is opened, the electronic Exit Stopper (STI-6400) emits an ear piercing 105 dB warning horn, which will draw attention in a hurry. When activated, the alarm will continue for 30 seconds, three minutes or continuously (as preset by the user). A key operated override will silence the alarm and allow authorized exits. Another option is annunciator mode, in this mode it announces a doors opening with a set of 10 beeps and then resets. This highly visible “stop sign” design acts as a deterrent, completely self-contained and easy to install. May be mounted on top, right, left or next to almost any door. Exit Stopper is fitted with a long life 9-VDC alkaline battery. It is available in red or green for almost any type of door, mounting or installation. Has a 3 year guarantee against breakage of polycarbonate in normal use (one year on electro mechanical and electronic components). Safety Technology International, Inc. "We protect the things that protect you" Review: Sold as advertised A+ Review: Small alarm but gets it done ## Features - Highly visible "stop sign" design acts as a deterrent - Virtually indestructible polycarbonate housing - Detects both unauthorized exits and entries - Less expensive than heavy horizontal bar type units - 3 year guarantee against breakage of polycarbonate in normal use (one year on electro mechanical and electronic components). ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0006AZDII | | Audible Noise | 105 Decibels | | Battery Description | Alkaline | | Best Sellers Rank | #1,718,200 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #10,669 in Storage Boxes | | Brand | STI | | Built-In Media | 9V Battery, Door Alarm, Reed/Magnet | | Colour | Red | | Control Method | Touch | | Customer Reviews | 4.6 out of 5 stars 492 Reviews | | EU Spare Part Availability Duration | 3 Years | | Global Trade Identification Number | 00662950640004 | | 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 | | Manufacturer | Safety Technology International, Inc. | | Manufacturer Warranty Description | Lifetime guarantee against breakage of the polycarbonate housing in normal use (one year on electronic components). | | Mfr Part Number | STI-6400 | | Model Number | STI-6400 | | Mounting Type | Door Mount | | Number of Batteries | 1 9V batteries required. (included) | | Power Source | Battery Powered | | Product Dimensions | 17.3L x 6.9W x 1H Centimeters | | Sensor Technology | Contact Sensor | | Size | 1 Pack | | UPC | 737214686613 662950640011 662950640004 | | Unit Count | 1.0 Count | | Voltage | 9 Volts | ## Product Details - **Battery Description:** Alkaline - **Brand:** STI - **Colour:** Red - **Power Source:** Battery Powered - **Product Dimensions:** 17.3L x 6.9W x 1H Centimeters ## Images ![Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors - Image 1](https://m.media-amazon.com/images/I/71dEx4W3qvL.jpg) ![Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors - Image 2](https://m.media-amazon.com/images/I/61-5NenwsiL.jpg) ![Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors - Image 3](https://m.media-amazon.com/images/I/61zJLyr+fqL.jpg) ## Questions & Answers **Q: Sti release a newly redesigned exit stopper door alarm on april 2018. is this the newer version?** A: The newer version STI-6400 2018 to current will have a red table of 8 switches, older models have switches labelled JP **Q: How is it installed?** A: Simple, just mount the magnet on the door frame and the main unit onto the doo. When properly mounted and key switch is turned on, the opening of the door will pull the unit away from the magnet that then releases the internal read switch causing the siren to alert. MOUNTINGH: Close the door then mount the magnet on the inside door frame at the opposite side of the hinges (opening). Depending on the conditions, locate the magnet either at the top or side of the door frame near the door's surface but do allow a slight distance from the actual door surface so that it doesn't stop the door from closing. Once it is mounted you will mount the main unit onto the actual door putting the read switch side of the unit so it is very close and lined-up evenly with the top of the magnet's surface. You will need to disassemble the unit so as to mount the unit to the door as well as to insert or change the battery. There are two types of keys for this unit, the metal type key has a fork end on it that fits into the screw head that holds unit together. The gold keys (two) are used to turn on or shut off the unit. You will need to have this gold key available to turn-off the unit or to turn on the unit. **Q: Alarm goes off even when key is off. What am I doing wrong?** A: Thank you for reaching out to STI. Unit should not sound after key has been turned to the horizontal "off" position. If this is happening you may want to check the key switch wires are still in the key switch terminal. For further discussion on this please contact me direct Tasha/STI Tech Support/ 800-888-4784 x213. Best Regards. **Q: Can I order extra keys? We use these in a dorm each summer for a camp and we have lost ours.** A: I had to order a new one to get the key. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Sold as advertised A+ *by J***T on 18 March 2024* ### ⭐⭐⭐⭐⭐ Small alarm but gets it done *by J***R on 14 August 2020* ### ⭐⭐⭐⭐⭐ الجودة *by R***A on 8 September 2025* التوصيل كان سريع والشحنة مناسبة للعمل وذات جودة ممتازه ## Frequently Bought Together - Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors - SmartSign (Pack of 4) 5 x7 inch “Emergency Exit Only - Security Alarm Will Sound If Door is Opened” Sticker Labels, 5 mil Laminated Polyester with SuperStick Adhesive, Red and White, Made in USA - Safety Technology International, Inc. STI-6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery --- ## 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.tn/products/337488095-safety-technology-international-inc-sti-6400-exit-stopper-multifunction-door](https://www.desertcart.tn/products/337488095-safety-technology-international-inc-sti-6400-exit-stopper-multifunction-door) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-09*