BRK SA520B AC/DC Interconnect Smoke Alarm

120V AC/DC BRK Wireless Interconnect Smoke Alarm-Bridge Unit BRK SA520B (model SA520) is a wire-in, 120V AC 60Hz single and/or multiple station photoelectric smoke alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories, and other multifamily dwellings as defined in standard NFPA 101. BRK SA520B has been fully tested and complies with, UL217, CSFM, NFPA 72, and NFPA 101 and other agencies that model their codes after the above agencies. It meets building codes where AC with battery backup smoke alarms with wireless interconnect and silence features are required and with model building codes published by the ICC. BRK Wireless Interconnect 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 alar