--- product_id: 287879057 title: "Safety Technology International, Inc. -6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors" brand: "sti" price: "₩218390" currency: KRW in_stock: true category: "Sti" url: https://www.desertcart.kr/products/287879057-safety-technology-international-inc-6400-exit-stopper-multifunction-door-alarm store_origin: KR region: South Korea --- # Long-life 9V alkaline battery included 105 dB piercing alarm Virtually indestructible polycarbonate Safety Technology International, Inc. -6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors **Brand:** sti **Price:** ₩218390 **Availability:** ✅ In Stock ## Summary > 🚪 Stop breaches before they start with STI’s unstoppable Exit Stopper! ## Quick Answers - **What is this?** Safety Technology International, Inc. -6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors by sti - **How much does it cost?** ₩218390 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/287879057-safety-technology-international-inc-6400-exit-stopper-multifunction-door-alarm) ## 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 - • **Flexible Alarm Modes:** Choose from 30 seconds, 3 minutes, continuous, or annunciator beep modes to fit your security needs. - • **Durability Guaranteed:** 3-year polycarbonate breakage warranty plus 1-year electronics coverage means long-term peace of mind. - • **Powerful 105 dB Alarm:** Ear-piercing sound ensures unauthorized exits or entries get noticed immediately—no sneaky escapes. - • **Effortless Installation:** Self-contained, door-mount design fits almost any door orientation—get protected in minutes. - • **Unmissable Deterrent Design:** Highly visible stop sign instantly signals 'no entry'—command attention before a breach happens. ## Overview The STI 6400 Exit Stopper is a multifunction door alarm designed to prevent unauthorized exits and entries through emergency doors. Featuring a loud 105 dB alarm, a highly visible stop sign design, and a virtually indestructible polycarbonate housing, it offers flexible alarm timing modes and easy installation on nearly any door. Powered by a long-life 9V alkaline battery and backed by a 3-year housing warranty, this device is a reliable, cost-effective security solution for professional environments. ## 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" ## 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 | | ASIN | B0006AZDII | | Audible Noise | 105 Decibels | | Batteries | 1 9V batteries required. (included) | | Battery Description | Alkaline | | Best Sellers Rank | #7,116 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Home Alarm Systems | | Brand | STI | | Built-In Media | 9V Battery, Door Alarm, Reed/Magnet | | Color | Red | | Control Method | Touch | | Country of Origin | China | | Country of origin | China | | Customer Reviews | 4.6 4.6 out of 5 stars (504) | | Customer reviews | 4.6 4.6 out of 5 stars (504) | | 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 model number | STI-6400 | | Manufacturer | Safety Technology Intl | | Manufacturer | Safety Technology Intl | | Mfr Part Number | STI-6400 | | Model Number | STI-6400 | | Mounting Type | Door Mount | | Number of Batteries | 1 9V batteries required. (included) | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | Battery Powered | | Product Dimensions | 6.8 x 2.7 x 0.01 cm; 440 g | | Sensor Technology | Contact Sensor | | Size | 1 Pack | | UPC | 662950640011 737214686613 662950640004 | | Unit Count | 1 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. -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) ## Available Options This product comes in different **Style** options. ## 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. ## 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.kr/products/287879057-safety-technology-international-inc-6400-exit-stopper-multifunction-door-alarm](https://www.desertcart.kr/products/287879057-safety-technology-international-inc-6400-exit-stopper-multifunction-door-alarm) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-10-18*