BRK CO5120BN Carbon Monoxide Detector without Strobe

The BRK CO5120BN is a hard-wired carbon monoxide combo alarm with battery backup. It features a CO sensor, Intelligent Sensing Technology™ for fewer unwanted alarms, an 85dB horn, 9V battery backup, side-load battery drawer, two silence features and is interconnectable with up to 18 devices. Features 85dB horn alarm  T4 alarm sound pattern Latching alarm indicator remembers which unit initiated an alarm  Intelligent Sensing Technology reduces nuisance alarms Smart Interconnect is compatible with both BRK smoke and CO alarms  Two silence features can silence the low battery chirp up to 8 hours or temporarily silence an unwanted alarm  Quick, easy (hardwired) installation  Available with or without a strobe light Specs Seven year limited warranty Weight: 2lbs Documentation  BRK CO5120BN Hard-Wired Carbon Monoxide Alarm User Manual