

The 120V AC Wire-in Smoke Alarm (Part Number 21010407-A) is a reliable safety device that features Ionization Sensing Technology for fast smoke detection. Compatible with the Sealed 10-Year Lithium Battery Model i12010S, this alarm includes a Hush® Button, Alarm Memory Indicator, and 360° Mounting Plate with Tamper Resistance. With 2 LED Indicators, this alarm ensures easy installation and can be mounted in minutes. We know appliances inside and out and will help you find the right part with expert, honest advice.