--- product_id: 719475148 title: "Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery" brand: "sti" price: "€ 313.42" currency: EUR in_stock: true category: "Sti" url: https://www.desertcart.pt/products/719475148-safety-technology-international-inc-sti-6402-105-db-exit-stopper store_origin: PT region: Portugal --- # 105 dB ultra-loud alarm 9V battery powered, included Versatile multi-position door mounting Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery **Brand:** sti **Price:** € 313.42 **Availability:** ✅ In Stock ## Summary > 🚨 Don’t just secure your space—command it with STI-6402’s fierce 105 dB alert! ## Quick Answers - **What is this?** Safety Technology International, Inc. STI-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?** € 313.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/719475148-safety-technology-international-inc-sti-6402-105-db-exit-stopper) ## 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 - • **Powerful 105 dB Alarm:** Instantly deters unauthorized access with ear-piercing volume - • **Dual-Function Security:** Works as both entry and exit alarm for comprehensive protection - • **Expandable Alarm System:** Onboard relay contacts enable integration with visual alarms or multi-zone setups - • **Multi-Door Compatibility:** Fits double doors and mounts top, side, or adjacent for ultimate flexibility - • **Plug & Play Installation:** Self-contained design means no hassle, just mount and secure ## Overview The STI-6402 Exit Stopper is a compact, battery-powered door alarm delivering a piercing 105 dB alert to prevent unauthorized entry or exit. Designed for double doors, it offers versatile mounting options and includes a 9V battery for immediate use. Its self-contained, easy-install design and relay contacts allow for expanded security configurations, making it a smart, professional-grade solution for home or office safety. ## Description EMER,DR ALM EXIT STPR DBLE DR ## 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 | | Audible Noise | 105 Decibels | | Battery Description | Alkaline | | Brand | STI | | Colour | red | | Control Method | Touch | | Customer Reviews | 4.6 4.6 out of 5 stars (131) | | Global Trade Identification Number | 00662950640202 | | Item Dimensions L x W x H | 13.7L x 13.7W x 5.1H Centimeters | | Item Weight | 363 g | | Manufacturer | Safety Technology International, Inc | | Mfr Part Number | 6402 | | Model Number | STI-6402 | | Mounting Type | Door Mount | | Number of Batteries | 1 9V batteries required. (included) | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Battery Powered | | Sensor Technology | Contact Sensor | | Size | 5 inches diameter x 1.875 inches depth | | UPC | 662950640202 | | Unit Count | 1.0 Count | | Voltage | 9 Volts | ## Product Details - **Battery Description:** Alkaline - **Brand:** STI - **Colour:** red - **Power Source:** Battery Powered - **Product Dimensions:** 13.7L x 13.7W x 5.1H Centimeters ## Images ![Safety Technology International, Inc. STI-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/41aMvCIJzlL.jpg) ![Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery - Image 2](https://m.media-amazon.com/images/I/410zC7XEkdL.jpg) ![Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery - Image 3](https://m.media-amazon.com/images/I/31RwgHixVLL.jpg) ![Safety Technology International, Inc. STI-6402 105 dB Exit Stopper Multifunction Door Alarm for Double Doors with on/off Switch and 9 Volt Battery - Image 4](https://m.media-amazon.com/images/I/61QQqshHzRL.jpg) ## 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. ## 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.pt/products/719475148-safety-technology-international-inc-sti-6402-105-db-exit-stopper](https://www.desertcart.pt/products/719475148-safety-technology-international-inc-sti-6402-105-db-exit-stopper) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-29*