---
product_id: 736682609
title: "Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors"
brand: "sti"
price: "NT$690153"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/736682609-safety-technology-international-inc-sti-6400-exit-stopper-multi-function
store_origin: TW
region: Taiwan
---

# 105 dB piercing alarm long-life 9V alkaline battery included virtually unbreakable polycarbonate Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors

**Brand:** sti
**Price:** NT$690153
**Availability:** ✅ In Stock

## Summary

> 🚪🔒 Secure your space with the STI-6400 – where safety meets smart design!

## Quick Answers

- **What is this?** Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors by sti
- **How much does it cost?** NT$690153 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/736682609-safety-technology-international-inc-sti-6400-exit-stopper-multi-function)

## 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

- • **Peace of Mind Warranty:** 3-year polycarbonate and 1-year electronics warranty ensures lasting protection
- • **Universal Mounting Versatility:** Fits almost any door with multiple mounting options for seamless installation
- • **Flexible Alarm Duration Settings:** Choose 30 seconds, 3 minutes, or continuous alarm modes for tailored security
- • **Stop Unauthorized Access Instantly:** 105 dB alarm grabs immediate attention to deter breaches
- • **Built to Withstand the Toughest Conditions:** Durable polycarbonate housing resists breakage and vandalism

## Overview

The STI-6400 Exit Stopper by Safety Technology International is a multi-function door alarm designed to prevent unauthorized entry and exit through emergency doors. Featuring a loud 105 dB alarm, virtually unbreakable polycarbonate housing, and flexible alarm duration settings, it offers robust, easy-to-install security. Powered by a long-life 9V alkaline battery and backed by a 3-year warranty on the housing, this device is a cost-effective alternative to heavy-duty horizontal bar alarms, ideal for professional environments seeking reliable door security.

## Description

Safety Technology International, Inc. - STI 6400 Exit Stopper Multifunctional Door Alarm Helps prevent unauthorized entrances and entrances through emergency doors. When the protective door is open, the Electronic Exit Stopper (STI-6400) releases the ear piercing 105dB warning horn and will quickly draw attention. When enabled, the alarm will be 30 seconds, 3 minutes, or continuously (as the user set). Override of key operation mutes alarm and allows allowable end Another option is Analyator Mode. In this mode, the door opening will be released with 10 beeps, and reset. This highly visible "stop sign" design acts as a deterrent and is fully self-contained and easy to install. Can be mounted on the top, right, left or next to almost any door. Exit Stopper comes with a long life 9-VDC alkaline battery. Available in almost any type of door, mounting or mounting in red or green 3 year warranty against polycarbonate breakage during normal use (1 year on electrical machinery and electronic components) Safety Technology International, Inc. We protect the things that protect that protect.

## Features

- Easy-to-read "stop sign" design acts as a suppression effect
- Virtually unbreakable polycarbonate housing
- Detects both unauthorized exits and entries
- Less expensive than heavy horizontal bar type units
- 3 year warranty against polycarbonate breakage during normal use (1 year for electrical and electronic components)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Batteries | 1 9V batteries required. (included) |
| Voltage | 9 Volts |
| Control Method | Touch |
| Noise Level | 105 dB |
| Mounting Type | Door Mount |
| Sensor Technology | Contact Sensor |
| UPC | 737214686613 662950640011 662950640004 |
| Global Trade Identification Number | 00662950640004 |
| Manufacturer | Safety Technology Intl |
| Model Number | STI-6400 |
| Product Dimensions | 17.27 x 6.86 x 1.02 cm; 453.59 g |
| Material | Polycarbonate |
| Included Components | 9V Battery, Door Alarm, Lead/Magnet |
| Are Batteries Included | Yes |
| Battery Type | Alkaline |
| Item Weight | 454 g |

## Product Details

- **Color:** red
- **Brand:** STI
- **Power Source:** Battery Powered
- **Product Dimensions:** 17.3L x 6.9W x 1H cm
- **Battery Description:** Alkaline

## Images

![Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors - Image 1](https://m.media-amazon.com/images/I/71dEx4W3qvL.jpg)
![Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors - Image 2](https://m.media-amazon.com/images/I/61-5NenwsiL.jpg)
![Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors - Image 3](https://m.media-amazon.com/images/I/61-5NenwsiL.jpg)
![Safety Technology International, Inc. STI-6400 Exit Stopper Multi-Function Door Alarm - Prevents unauthorized entry and exit from emergency doors - Image 4](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.

## Frequently Bought Together

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-23*