STI 1150CR Stopper II with Horn Flush Mount, Indoor/Outdoor Rated, Custom Label

Keep fire alarm pull stations protected and false activations down with the Safety Technology International STI 1150CR Stopper II protective cover. Designed for B2B facilities managers, security integrators and building operators, this protective cover combines rugged polycarbonate construction with an internal 95/105 dB warning horn so that any unauthorized lift immediately draws local attention before a false alarm is completed. The clear, flush-mount design maintains visibility and ADA compliance while permitting legitimate emergency use without restriction.

Rated for indoor and outdoor use, the Stopper II reduces service calls, protects devices from vandalism and harsh environments, and supports broader physical security and monitoring programs. The unit ships with a 9V battery and is UL/cUL listed to meet building and fire code expectations. Ideal for schools, hospitals, retail, hospitality and municipal facilities, this security cover integrates with your fire alarm strategy and surveillance efforts to improve operational uptime and reduce nuisance alarms. Specify custom labeling for site-specific messaging and order today to reinforce fire alarm protection and tamper deterrence across your properties.

• Stops costly false fire alarms by alerting staff immediately when cover is lifted, reducing nuisance activations and emergency responses
• Durable polycarbonate, tamperproof and dustproof design protects devices indoors or outdoors, minimizing maintenance and replacement costs
• Built-in 95/105 dB audible horn notifies occupants and deters intentional tampering while allowing legitimate alarm activation
• Flush-mount profile preserves aesthetics and ADA compliance for schools, hospitals, hotels and commercial buildings
• Self-contained power with included 9V battery and backed by a 3-year limited warranty for reliable, low-maintenance operation