USI Electric Carbon Monoxide Smart Alarm Detector Battery Operated Case Of 6 | HD Supply

The Universal Security Instruments MC304SB Carbon Monoxide Smart Alarm provides 10-years of continuous protection against the silent killer - carbon monoxide. Perfect for new or replacement installations, this maintenance-free alarm is suitable for houses, apartments and mobile homes in every room. The sealed battery included will never have to be replaced throughout the life of the alarm, giving you a decade of peace of mind even in the event of a power outage. Permanent Power also saves money from battery replacements up to $38.00 over the 10-year life of the alarm, eliminates annoying low b