Smoke and Carbon Monoxide Alarm, Battery Chemistry Alkaline, Battery Location Side, Battery Locking Pin Yes, Battery Size AA, Communication Protocol Hardwired Interconnect, Compatible With 7010, 7010B, 9120, 9120B, CO5120BN, CO5120PDBN, HD6135F, SC7010B, SC7010BV, SC9120B, SMCO100V-AC, SMI100-AC, Detector Type Smoke/CO Detector, Features Voice Alert, Includes AA Batteries, Easy Adapter Plug, Number of Tandem Detectors 12, Power Source Hardwired, Sensor Type Electrochemical, Photoelectric
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