STI 1100NR Stopper II with Horn Flush Mount, No Label

Prevent false alarms and protect your fire alarm points with the Safety Technology International Stopper II protective cover. Engineered for facilities management and security teams, this security cover secures manual pull stations while still allowing legitimate alarms to activate without delay. The flush-mount STI-1100NR features a self-contained 105 dB horn that sounds when the cover is lifted, improving on-site monitoring and deterring intentional or accidental tampering. Constructed from UV-stabilized polycarbonate, the tamperproof cover withstands indoor and outdoor conditions and fits virtually all manual pull stations to simplify deployment across campuses, hospitals, hotels, and retail environments. UL/cUL Listing and ADA compliance help you meet regulatory requirements, while battery operation reduces wiring complexity for quick retrofits. Use the Stopper II to reduce false alarm expenses, protect critical alarm devices, and strengthen your overall security and surveillance strategy. Ideal for building managers and safety directors who need a durable, code-compliant solution—order the STI 1100NR Stopper II today or contact your distributor to specify it for your next safety upgrade.

• Stops costly false fire alarms by securing manual pull stations with an audible deterrent and tamperproof design
• Built-in 105 dB self-contained horn alerts staff when cover is lifted, improving monitoring and response
• Durable, UV-stabilized polycarbonate resists vandalism and harsh environments for reliable long-term protection
• Fits virtually all manual pull stations and is UL/cUL Listed and ADA compliant to simplify code adherence
• Battery-powered, surface-mount design provides easy installation and low maintenance for schools, hospitals, and commercial properties