Gentex Photoelectric Smoke Alarm with Plug-In Line Cord, ADA Strobe and Battery Backup

The 7139LS is a 120VAC with 9VDC battery back-up photoelectric smoke alarm designed to give reliable early warning of the presence of smoke where both audible and visual alarms are required. The 7139LS a 9 ft. plug-in line cord for ease of installation in any space where a visual alarm is required. Fully insect screened.|120 VAC with 9VDC battery back-up|90dBA temporal 3-evacuation piezo horn with 3100Hz (nominal) horn frequency|On-site washing program|Nominal 2.5% sensitivity|3-position test switches|Low or missing battery indicator|9 ft. plug-in line cord|1-year warranty from date of purchase