Kidde 21007588 Hardwired Interconnectable 120-Volt Smoke Alarm with Battery Backup, 4-Pack

Price: $189.00
(as of Sep 27, 2026 12:32:13 UTC – Details)


The Walter Kidde Hardwire Smoke Alarms (4-Pack) alert you to potential fire dangers by detecting the presence of smoke and heat in the atmosphere. These alarms are equipped with 2 pre-stripped wires for easy installation and have a 9 Volt battery backup to ensure continued use during a power failure. The alarms feature a dust cover that protects the internal sensor from airborne contaminates that may take flight during a fire or a construction job.
Detects smoke and heat for reliable protection against fire
Hush alarm control button silences false alarms
Test button allows you to check functionality without sounding the full alarm
Customers find the smoke alarm easy to install and reliable, with no false alarms reported, and consider it good value for money. They appreciate the wiring harness, with one customer noting it’s easy to swap into existing wiring. The battery life and compatibility receive mixed reviews.