BRK SC9120B Carbon Monoxide and Smoke Alarm, Electrochemical, Ionization Sensor, 85 dB @ 10 ft Audible Alert

Carbon Monoxide and Smoke Alarm, Battery Chemistry Alkaline, Battery Location Side, Battery Locking Pin Yes, Battery Size 9V, Communication Protocol Not Applicable, Compatible With BRK Hardwired Alarms, Detector Type Smoke/CO Detector, Includes Battery, Number of Tandem Detectors 18, Power Source Hardwired, Sensor Type Electrochemical, Ionization, Visual Alert Type LED, Volume Level 85 dB @ 10 ft, Alert Type Sound, Battery Backup Yes, Color White, Detects Smoke, Hush Mode Yes Item Carbon Monoxide and Smoke Alarm Power Source 120V AC, 9V Detection Method Electrochemical, Ionization Interconnection Capability Up to 18 Units Audible Alert 85 dB @ 10 ft Visual Alert Style LED Hush Button Yes Digital Readout No Battery Location Side Voltage 120V AC Color White Locking Pin Yes Battery Backup Yes Visual Alert Red LED Test Button Yes Operating Temp. 40 Degrees to 100 Degrees F Standards UL2034, UL217 Includes Battery Volume Level 85 dB @ 10 ft Maxim