First Alert 9120LBL Hardwired Smoke Detector with 10-Year Battery Backup

Dimensions (Overall): 2 Inches (H) x 5.6 Inches (W) x 5.6 Inches (D)
Weight: 7.8 ounces
Package Quantity: 1
Requires Hardwired Installation: Yes
Battery: 1 9-Volt Lithium, Required, Included
Warranty: 10 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item,
•Keep your family safe with this hardwired smoke alarm; the 10-year battery backup means constant monitoring for the life of the alarm, even if there's a power failure
•Hardwired smoke detector features an ionization sensor; loud 85-decibel alarm sounds when smoke or CO levels are elevated
•Connect with up to 12 compatible First Alert or BRK devices (sold separately) for a home safety network
•Simple to use, with a single test/silence button, and side-load battery compartment
•Tamper-resistant locking brackets and universal mounting brackets make installation easy
•Meets UL standards; 10-year limited warranty
This First Alert Hardwired Smoke Alarm includes a 10-year battery backup that continues to protect you in the event of a power failure. It uses an ionization smoke detector, and features a loud 85-decibel alarm. One button silences any nuisance alarms, and also tests detector functions. The latching alarm indicator automatically identifies which unit initiated the alarm, even after conditions that set off the alarm have subsided. And an end-of-life signal enhances your safety by letting you know when it's time to replace the unit. Connect it to up to 12 compatible First Alert or BRK devices (sold separately) within a single-family residence.