X-Sense SC07-W Wireless Interlinked Combo Smoke & Carbon Monoxide Alarm - 3-Pack

Interconnected Alarm. CO Sensitivity. 10-year sealed lithium battery. Alarm Loudness. ≥ 85 dB at 3 m (10 ft) @ 3.2 ± 0.3 kHz pulsing alarm. 24 wireless units (only compatible with X-Sense wireless alarms).