Top 9 Best Optical Fire Alarm

✔First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
✔Meets UL217 standards and complies with legislative requirements for 10 year battery operated smoke alarms
✔Loud 85 decibel siren sounds to alert you to danger, Hardwired alarm includes battery backup for power outages
✔Complies with all current 10 year legislation in U.S. states/cities where required

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✔To ensure complete protection make sure to place one on each level of your home and in each bedroom
✔Single test/silence button lets you easily check alarm function and mute false alarms; Use Polaroid AA batteries for best results
✔Help keep your family safe with this battery operated smoke alarm; It requires no rewiring for installation and provides continuous monitoring even if there's a power failure

✔9-volt battery included; 10-year limited warranty
✔Also includes side battery drawer and missing battery guard
✔Ionization battery-operated smoke alarm with escape light
✔To ensure complete protection make sure to place one on each level of your home and in each bedroom
✔Also features a single test/silence button and EZ-Access battery door
✔Help keep your family safe with this battery-operated smoke alarm that includes a light to illuminate an escape path in the event of an emergency

✔First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
✔To ensure complete protection make sure to place one on each level of your home and in each bedroom
✔Battery operated alarm unit provides continuous monitoring even if there's a power failure; Plus, it's easy to install
✔Help keep your family safe with this battery powered smoke alarm featuring an ionization sensor for smoke detection; a loud 85 decibel alarm sounds when smoke levels are elevated

✔5 Year Manufacturer’s Warranty
✔Carbon Monoxide Detector and Smoke Alarm Providing Whole-day Protection
✔Smoke and Carbon Monoxide Detector Offering Excellent Security: Making a Loud Alarm (85 dB) When It Detects a Buildup of Smoke or Carbon Monoxide, and Instantly Alert Those In Danger.

✔Easy installation
✔Test button tests unit's electronic circuitry horn and battery function
✔UL Certified, 10-year limited warranty
✔Test-silence button - allows for test & silence of alarm
✔Ionization sensing technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire

✔Worry-Free After-Sales Services: All X-Sense smoke detectors come with a 60-day money-back guarantee, a 5-year warranty, and lifetime customer support; easy-to-follow instructions are included for convenience; feel free to contact us if you have any questions
✔Quick and Easy Installation: No need for rewiring, as the battery-operated smoke alarm is easy to install with the included screws, anchor plugs, and mounting bracket, or just use an adhesive magnetic pad (sold separately) to effortlessly install it on a wall or ceiling
✔10-Year Battery Life Smoke Detector: Equipped with a sealed 10-year lithium battery for continuous power with no replacement required during the 10-year life of the alarm

✔10-year carbon monoxide sensor. Carbon monoxide is odorless, invisible and deadly. When there’s CO, Nest Protect tells you where it’s hiding.
✔Split-Spectrum Sensor. In an emergency, seconds count. Nest Protect uses two wavelengths of light to look for both fast and slow burning fires.
✔Tells you what and where. It speaks up to tell you if there’s smoke or CO and where the problem is, so you know what to do. Connectivity: Bluetooth 4.0 LE, Wi-Fi 4 (802.11n)
✔With Safety Check you can test all your smoke and CO alarms with just a tap and get a full report once the test is done
✔A Light in the Dark: Usually Nest Protect has its light turned off but when you walk underneath it Pathlight can light your way.
✔With App Silence you can silence the smoke alarm with your phone in the Nest app when there's only a little smoke
✔Get phone alerts so you know something's wrong even when you're away from home[1]
✔Smoke detector and carbon monoxide detector that speaks up in a friendly voice to give you an early warning when there's smoke or CO in your home

✔85 decibel alarm
✔Inter connectable with BRK and first alert hardwired smoke and carbon monoxide alarms
✔120 volt hardwire smoke alarm with photoelectric sensor and battery backup