Innolink Hardwired Interconnected Smoke Detector, AC Smoke Alarm with DC 9V Backup Battery, ETL-9th Listed Fire Alarm, 4 Packs

This is a photoelectric smoke alarm conforms to UL STD 217 9th Ed. This smoke detector is powered by 120V AC with a 9V battery backup. It is a multi-station smoke sensor and can be hardwired. This fire detector contains no radioactive material and is environmentally friendly. The fire alarm also can reduce the probability of nuisance alarms effectively.

• ETL listed, conforms to UL STD 217 9th Ed
• Hardware Interconnection : Up to 12 detectors
• Includes battery backup