USI Sensing Plus Hard-Wired w/Battery Back-up Ioni

Updated August 27, 2026

Price: $30 Brand: USI In Packaging?: Yes Assembly Required?: No Damaged?: No Functional?: Yes Missing Parts?: No Model: AMI3051SB Star Rating: 0.0 UPC: 042741830515 $30 The Universal Security Instruments AMI3051SB 2-in-1 Sensing Plus Smoke and Fire Alarm provides 10 years of continuous protection against deadly threats in the home. New Sensing Plus Multi-Criteria Detection provides the benefits of both photoelectric and ionization alarms in one device to protect against fast flaming and slow smoldering fires. Perfect for new or replacement installations, this maintenance-free alarm is suitable for houses, apartments and mobile homes. The sealed battery (included) will never have to be replaced throughout the life of the alarm, giving you a decade's worth in peace of mind even in the event of a power outage.

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