Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

BRK Hardwired (with Battery Backup) Ionization Interconnected Combination Smoke and Carbon Monoxide Detector

First Alert BRK Hardwired (with Battery Backup) Ionization Interconnected Combination Smoke and Carbon Monoxide Detector

4.5
651
See Product Details
64 Questions
Read All Questions & Answers

Can this model be used to replace model 4120SB?


Hi BobB, thank you for your question. Generally, new alarms will not be compatible with old mounting brackets. We recommend replacing your mounting bracket when you get a new alarm. This is a hardwired smoke (ionization) and CO detector with battery backup. - Maria

Was this Answer Helpful ?