STI-13330NR Universal Stopper Enclosed Flush Mount Back Box with Horn and Relay, No Label Included, Red

Keep critical alarm and access devices secure without hindering use. The Safety Technology International STI-13330NR protective cover (Universal Stopper®) shields pull stations, keypads, intercoms and emergency buttons from vandalism, accidental damage and environmental contaminants while preserving full functionality for authorized users. Molded from UV-stabilized polycarbonate, this enclosed flush-mount back box delivers durable impact resistance and weather protection (NEMA 3RX) for indoor and outdoor security and surveillance installations. An integrated horn and relay, capable of operating from 12–24 VDC remote power, adds audible alerting and straightforward integration into monitoring and access control systems. At 4" wide x 5.42" high with a 2.5" depth and backed by a 3-year limited warranty, the STI-13330NR combines dependable protection with easy installation and code-friendly features like ADA compliance. Ideal for commercial buildings, campuses and critical infrastructure, this protective cover helps maintain device uptime and reduces maintenance costs. Add the STI-13330NR to your security kit or contact our team to specify it for your next access control or fire protection project.

• Protects pull stations, keypads and emergency devices from vandalism and accidental damage while allowing legitimate operation
• Built-in horn and relay provide audible alerts and easy integration with security and monitoring systems (12–24 VDC)
• UV-stabilized polycarbonate resists impact, dust and grime for long-lasting outdoor and indoor use
• Enclosed flush back box simplifies installation and safeguards wiring for reliable access control and surveillance setups
• NEMA 3RX rating and ADA compliance ensure weather resistance and accessibility in demanding environments