STI 6404 Exit Stopper for Double Door with Remote Horn, 95 or 105 dB Alarm when Activated, not for outdoor use

Prevent unauthorized exits and strengthen door security with the Safety Technology International Exit Stopper STI-6404 exit door alarm. Designed for indoor use, this door alarm delivers a selectable 95 or 105 dB audible alert and a remote horn option to immediately draw attention when emergency or rear doors are misused. The STI-6404 works as a full alarm or an annunciator—letting you choose short beeps or a continuous alarm (30 seconds, 3 minutes or continuous) to match your site’s emergency procedures.

Installation is straightforward: mount on the door or adjacent wall and connect via battery or 12/24V DC power. Integrators will appreciate the optional Form C dry-contact relay for seamless connection to access control, surveillance and security monitoring platforms. Built-in features like a key-operated silence override, low battery warning, multilingual labels and a 3-year limited warranty make it ideal for schools, hospitals, retail and commercial facilities that need reliable, code-compliant exit protection.

Upgrade your facility’s perimeter and interior door monitoring—add the STI-6404 Exit Stopper to your security plan or contact us to integrate it with your existing surveillance and access systems.

• Deters unauthorized exits and entries with a loud 95/105 dB alarm that grabs attention and reduces liability
• Selectable alarm modes (alarm or annunciator) and adjustable duration for flexible incident response
• Remote horn and Form C dry-contact relay enable integration with access control, security monitoring and building systems
• Easy door or wall mounting with key-operated override for authorized egress and clear multilingual labels for staff and visitors
• Battery-powered with 12/24V input options, low-battery warning and extended battery life for reliable indoor operation