First Alert 7020B Photoelectric Smoke Alarm, 120 Volt Rope Adjustable threaded barrel compensates for

Adjustable threaded barrel compensates for various door clearances

Usage for track and recessed lighting

up to 150 sq

Two coats are necessary

3 AH NI-CD battery with double metal protection

First Alert 7020B Photoelectric Smoke Alarm, 120 Volt Rope Adjustable threaded barrel compensates forHighlights: 120V with 9V battery back up (easy side load) Optipath 360 smoke sensor Hardwire photoelectric smoke alarm with escape light Install in bedroom, family room or kitchen Intelligent sensor reduces nuisance alarms Silence test button, low battery warning Quick connect pig tails Blinking power indicator light Automatically performs internal test Universal mounting bracket with screw slots Interconnect up to 18 units Boxed