--- product_id: 263625454 title: "Safety Technology International, Inc. -6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery" brand: "sti" price: "฿8464" currency: THB in_stock: true reviews_count: 5 category: "Sti" url: https://www.desertcart.co.th/products/263625454-safety-technology-international-inc-6402-105-db-exit-stopper-multifunction store_origin: TH region: Thailand --- # 105 dB piercing alarm 9V long-life alkaline battery Easy DIY installation Safety Technology International, Inc. -6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery **Brand:** sti **Price:** ฿8464 **Availability:** ✅ In Stock ## Summary > 🚪🔒 Stop sneaky exits before they happen — loud, smart, and hassle-free! ## Quick Answers - **What is this?** Safety Technology International, Inc. -6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery by sti - **How much does it cost?** ฿8464 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/263625454-safety-technology-international-inc-6402-105-db-exit-stopper-multifunction) ## 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 - • **Smart Alarm Modes:** Choose from 30 seconds, 3 minutes, continuous alarm, or annunciator beep mode for tailored security alerts. - • **Plug & Play Protection:** Self-contained unit with included battery and mounting hardware—install in under 40 minutes, no pro needed. - • **Unmatched Audible Security:** Instant 95/105 dB alarm deters unauthorized exits and theft with ear-piercing clarity. - • **Durable & Weather-Resistant:** UV-stabilized polycarbonate housing built to withstand sun exposure and operate reliably from 32°F to 113°F. - • **Versatile Door Compatibility:** Mounts seamlessly on double doors, emergency exits, or rear doors—top, side, or adjacent placement. ## Overview The STI Safety Technology 6402 Exit Stopper is a high-decibel multifunction door alarm designed for double doors and emergency exits. Featuring a powerful 95/105 dB alarm, versatile mounting options, and multiple alert modes, it offers professional-grade security in a compact, easy-to-install package powered by a long-lasting 9V alkaline battery. Its rugged, UV-stabilized polycarbonate housing ensures durability in various environments, making it an essential tool for theft prevention and controlled access in commercial and residential settings. ## Description Safety Technology International, Inc. STI-6402 Exit Stopper Multifunction Door Alarm for Double Doors - Highly effective, alarm alerts to any unauthorized exits/entries through emergency exit doors and rear doors. Serves as an inexpensive security device and helps stop theft as well. If the protected door is opened, the electronic exit stopper for double doors emits a 95/105 ear piercing alarm for 30 seconds, three minutes or continuously. 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. Should not be exposed to water. Exit Stopper is fitted with a long life 9-VDC alkaline battery. Highly visible "stop sign" design and complete with double reed switch assembly to monitor double doors. Mounts easily next to any door, 9-VDC alkaline battery, screws and anchors included. Housing is molded of super tough polycarbonate and is UV-stabilized for minimal damage from the sun. Recommended operating temperature 32°F to 113°F (0°C to 45°C). Note: End user must verify the alarm and battery function every six months and replace battery annually or as required. STI "We protect the things that protect you." Review: Its very usefull to install in emergency doors! Have a good control and has a easy instalation. Review: Took only 35 min to put on fire escape door! No more folks sneaking out! ## Features - 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0015Q7XQM | | ASIN | B0015Q7XQM | | Batteries | 1 9V batteries required. (included) | | Batteries | 1 9V batteries required. (included) | | Batteries Included? | Yes | | Batteries Required? | Yes | | Battery Cell Type | Alkaline | | Best Sellers Rank | #66,555 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #76 in Smoke Alarms | | Color | 2 | | Control method | Touch | | Customer Reviews | 4.6 4.6 out of 5 stars (128) | | Customer reviews | 4.6 4.6 out of 5 stars (128) | | Date First Available | 10 August 2012 | | Date First Available | 10 August 2012 | | Global Trade Identification Number | 00662950640202 | | Included components | Mounting Screws (12)^Tamper Wrench^9V battery^Reed Switch(2)^Magnet(2)^Tamperproof Screw^Key Ring^Activation Key (2)^Door Alarmed label^Anchors (12)^Spacers (8)^Door alarm unit^Installation instructions | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 363 g | | Item model number | STI-6402 | | Item model number | STI-6402 | | Item weight | 363 g | | Manufacturer | Safety Technology International, Inc | | Manufacturer | Safety Technology International, Inc | | Material | Plastic | | Mounting type | Door Mount | | Noise level | 105 Decibels | | Number Of Pieces | 1 | | Number of batteries | 1 9V batteries required. (included) | | Part number | 6402 | | Product Dimensions | 13.65 x 13.65 x 5.08 cm; 362.87 g | | Product Dimensions | 13.65 x 13.65 x 5.08 cm; 362.87 g | | Sensor technology | Contact Sensor | | Style | Alarm | | UPC | 662950640202 | | Voltage | 9 Volts | | tech_spec_battery_description_toys | Alkaline | ## Product Details - **Battery description:** Alkaline - **Brand:** STI - **Colour:** 2 - **Compatible devices:** Key System - **Power source:** Battery Powered ## Images ![Safety Technology International, Inc. -6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery - Image 1](https://m.media-amazon.com/images/I/61QQqshHzRL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Dose it come with the key?** A: Our STI-6400 comes with 2 KIT-H19032 alarm keys (2341) and 2 KIT-H19016 service screw key **Q: where is this made?** A: Taiwan **Q: How do you shut off the short loud signal every minute or two that is obnoxious and assume is meant to indicate battery working?** A: That could indicate you have a low battery. Shut-off the unit and then replace the internal 9V battery. Then you can turn the unit back on and the indicator should go away. If you need instructions on how to do this let visit our website and you can access the installation sheet. Or email us at sales@sti-usa.com. **Q: If the door is opened in an emergency do the wires break away and if so can they be placed back?** A: The STI-6402 goes into alarm after given it's NC simulation. With the STI-6402 there will be (1) reed on board wired into the RS1 for the second door you will attach the additional reed in the hardware pack into the RS2. Each door will need to have the extra magnet along side each reed (wired magnet) and when they separate it goes into alarm. There is no disconnection of wires - visit this link to view it's install https://www.sti-usa.com/wp-content/uploads/6400Install.pdf. For more information you can reach out to STI tech support, support@sti-usa.com. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***Z on 25 October 2023* Its very usefull to install in emergency doors! Have a good control and has a easy instalation. ### ⭐⭐⭐⭐⭐ Review *by K***M on 13 April 2023* ### ⭐⭐⭐⭐⭐ Review *by D***H on 24 August 2023* Took only 35 min to put on fire escape door! No more folks sneaking out! ## Frequently Bought Together - Safety Technology International, Inc. STI-6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery - (2 Pack) Emergency Exit Only Alarm Will Sound Sign 10"x7" Emergency Exit Only Door Sign Self Adhesive Sticker Decal - Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors --- ## 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.co.th/products/263625454-safety-technology-international-inc-6402-105-db-exit-stopper-multifunction](https://www.desertcart.co.th/products/263625454-safety-technology-international-inc-6402-105-db-exit-stopper-multifunction) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-23*