Carbon Monoxide Alarm, Battery Chemistry Alkaline, Battery Location Front, Battery Locking Pin Yes, Battery Size AA, Communication Protocol Not Applicable, Compatible With Not Applicable, Detector Type CO Detector, Features Front Loading Battery, Includes Mounting Anchors, Screws, Number of Tandem Detectors Not Applicable, Power Source Removable Battery, Sensor Type Electrochemical, Visual Alert Type LED, Volume Level 85 dB @ 10 ft, Battery Backup No, Hush Mode Yes, Includes Batteries Yes