Smoke and Carbon Monoxide Alarm, Battery Chemistry Lithium, Battery Location Side, Battery Locking Pin Yes, Battery Size 3V, Communication Protocol Hardwired Interconnect, Compatible With 1039102, 3120B, 7010, 7010B, 7010BSL, 7020B, 7020BSL, 7030BSL, 9120, 9120B, CO5120BN, CO5120PDBN, HD6135FB, RM4, SA520, SC7010B, SC7010BV, SC9120B, SLED177, SM100V-AC, SM110LED-AC, SM300-AC, SM500-AC, SMCO100V-AC, SMCO110LED-AC, SMI100-AC, SMI105-AC, SMICO100-AC, SMICO105-AC, Detector Type Smoke/CO Detector
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