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

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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 Tone - Lower and varying frequency makes it easier for the elderly with normal aged related hearing loss to hear the horn. Latching Features: Alarm Latch - remembers which unit initiated an alarm. Low Battery Latch: Visually indentifies unit in low battery condition. 10-Years Limited Warranty Model # SA520B Weight 9.3 oz Operating Voltage 120V AC with battery backup (Two 1.5V AA Batteries) Humidity Range 10% to 90% relative humidity (RH) Smoke Sensor Photoelectric Listing ETL to UL 217 standard Show more