Ecoey Hardwired Smoke Detector Interconnectable UP to 12 Units, Smoke Detector 10 Year with Replaceable 9V Backup Battery, Fire Alarms Smoke Detectors with Photoelectric Sensor, 5 Packs

Features

• 10 YEAR ALARM LIFE: Equipped with advanced sensors of 10-year life span, smoke detector FJ162A provides long-lasting protection for your home. Hardwired into your house with 9V battery backup accompaning
• ONE ALARM TRIGGERED, ALL WILL SOUND: Hardwired interconnection between up to 12 smoke alarms plus 6 combo smoke and CO detectors. Even if you are in your room, you can be informed of danger from utility room/kitchen! Backup battery ensure uninterrupted guarding when AC power is unavailable
• FASTER DETECTION: The unique flared smoke inlet design allows smoke to collect in your smoke detectors faster. Tested, Ecoey FJ162A has a faster detection speed of about 15 seconds than others, which helps you to detect the fire danger earlier
• Flame-retardant MATERIAL: 2mm shell design, resistant to high temperature up to 230℉, it can protect the internal electronic components and give excellent performance even in the event of a fire
• ENLARGED AND EASIER TO REACH TEST/SILENCE BUTTON: After confirming there is no fire/gas hazard, press the SILENCE button for 5s to stop annoying alarms. Test fire alarms smoke detectors once a week during normal use. Press button into Do Not Disturb mode for 10 hours during low battery warning
• MOUNTING BACKPLATE INCLUDED: 144mm (5.7') large hanging plate adapted to 90% of the electrician box, adapting to different surfaces.The electrical box won't be exposed, saving you the trouble of removing screws.