BRK Electronics First Alert SA520B 120V AC/DC Wireless OneLink Smoke Alarm Bridge Unit

OneLink Wireless Alarms provide a cost effective solution when it comes to renovation and retrofit projects where interconnectability is a requirement. Easily interconnect between floors and new to existing construction wirelessly. OneLink enabled alarm Bridge Unit - Wireless Photoelectric Hardwired Smoke Alarm Single button test/silence Two silence features - can silence the low-battery chirp for up to eight hours or temporarily silence an unwanted nuisance alarm Add additional OneLink alarms and hardwired alarms. Links all alarms together for a complete system. Hardwired interconnect and RF Interconnect: reliable and secure radio frequency communication between alarms. 915 MHz frequency with 65,000 security codes and 3 channel frequency hopping. Optipath 360 TechnologyTM - patented technology provides 360 degrees of direct access to the smoke sensor. Perfect Mount - allows for easy alignment of alarm Spread Spectrum Horn Ton