BRK®First Alert® Smoke and carbon monoxide alarm designed for easy install, reduced maintenance, and fewer callbacks. 
Features a photoelectric smoke sensor.  
 • Includes 2 AA replaceable batteries, standardized mounting bracket, and optional Trim Ring. 
 • Features enhanced LEDs for easy diagnostics and SoftCue™ early warning low-battery chirp to signal upcoming battery replacement.
 • MFG # SC601A