Best Wireless Smoke Alarm

First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated

Battery operated smoke and carbon monoxide alarm can be installed easily.
Connects multiple alarms together for wireless safety network.
Voice alarm gives clear indication of where the problem is located.
Features photoelectric smoke sensor and electrochemical CO sensor.
One button silences a false alarm and tests the unit. Loud 85 decibel alarm.
NOTE: Kindly refer to the user manual provided as a PDF manual in the product description section.
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).

Hear an Alarm From Anywhere: If one alarm detects smoke or dangerous CO levels, all wireless interconnected units will activate, ensuring the earliest possible warning.
Wide Coverage for Full Home Protection: Up to 24 X-Sense Link+ devices can be interconnected to create a wireless safety network for your entire house.
2-in-1 Protection: Equipped with both a photoelectric smoke sensor and an electrochemical CO sensor to provide reliable protection against both smoke and CO.
Built-In 10-Year Battery: Features a built-in 10-year lithium battery, so you’ll never need to worry about replacing batteries during the lifetime of the unit.
Real-Time CO Readings: The smoke and carbon monoxide alarm displays real-time CO levels from 30–999 ppm (parts per million) taken from the surrounding air, as well as battery level and working status.

...be discovered by the intruders. We have built in a 16GB micro SDHC class 10 sd card before ex-work that can save about 50 minutes video footage, and you can change it to a larger capacity micro sd card but 64GB in max for longer video storage time. We recommend you to use a 64GB Micro SDXC Class 10 SD Card..
【2.4G Wireless Remote Controller】A 2.4G wireless remote controller is attached to this smoke sensor camera for easy operation of its various functions such as mode switch between motion detection video recording and normal video recording, start or stop of video recording, and taking pictures and so on..

...d off but when you walk underneath it Pathlight can light your way..
Fast Detection: Every second counts. The Split-Spectrum Sensor looks for both fast and slow burning fires..
Know from anywhere: Connect Nest Protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low.
Wireless: Working Wi-Fi connection: 802.11b/g/n @ 2.4GHz Wireless reconnect: 802.15.4 @ 2.4GHz Wireless Interconnect: 802.15.4 @ 2.4GHz Bluetooth Low Energy (BLE). Tells you what and where: It speaks up to tell you if there's smoke or CO and where..
App Silence: Nest Protect is the first alarm you can hush from your phone. Simply walk to the Nest Protect that noticed the problem and open the Nest app..
Split-Spectrum Sensor: In an emergency seconds count. Nest Protect uses two wavelengths of light to look for both fast and slow burning fires..
This Google Product features the Google Seal for Online Marketplace when purchased from a seller other than Amazon..
Know from anywhere: Connect Nest Protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low. Field of View 120°.
Wireless: Working Wi-Fi connection: 802.11b/g/n at 2.4GHz Wireless Interconnect: 802.15.4 at 2.4GHz Bluetooth Low Ene....

2-in-Protection: This combination detector protects against both smoke and carbon monoxide.
Wireless Interconnection: When one alarm sounds, all alarms will go off.
10-year Sealed Battery: This wireless alarm features a 10-year lithium battery and will give a low battery warning.
Test/Silence Button: The single push of a button will either test or silence all units in the system.
Full Home Coverage: Link up to 24 Link+ wireless smoke alarms, CO alarms, and combination alarms for maximum home protection.

Product 1: Battery operated smoke and carbon monoxide alarm can be installed easily.
Product 1: Connects multiple alarms together for wireless safety network.
Product 1: Voice alarm gives clear indication of where the problem is located.
Product 1: Features photoelectric smoke sensor and electrochemical CO sensor.
Product 2: Help keep your family safe with this battery powered smoke alarm featuring an ionization sensor for smoke detection.

...ke detector has manifold self-inspection parameters with clear notifications.
if it malfunctions, or if the battery is low, you will be notified immediately so that you can identify and resolve the problem quickly for comprehensive protection.
Easy Installation: The smoke alarm takes advantage of simple, stable, and wireless installation with the provided screws, or quick and easy installation via Ø 2.8 in magnetic adhesive pads (not included).
Premium Quality: Made with an upgraded premium ABS plastic housing, this alarm is fire-retardant, high temperature resistant, and corrosion resistant.
backed by a 60-day money-back guarantee and an after-sales service team to help you resolve any quality issues within 5 years.

2-in-1 Protection: This combination detector protects against both smoke and carbon monoxide.
Wireless Interconnection: When one alarm sounds, all alarms will go off.
10-year Sealed Battery: This wireless alarm features a 10-year lithium battery and will give a low battery warning.
Test/Silence Button: The single push of a button will either test or silence all units in the system.
Full Home Coverage: Link up to 24 Link+ wireless smoke alarms, CO alarms, and combination alarms for maximum home protection.

Product 1: Battery-operated smoke and carbon monoxide alarm.
Product 1: Connects multiple alarms together for wireless safety network.
Product 1: Voice alarm gives clear indication of where the problem is located.
Product 1: Features photoelectric smoke sensor and electrochemical CO sensor.
Product 2: Help keep your family safe with these battery operated smoke alarms that wirelessly interconnect with each other and other First Alert enabled alarms so that all sound when one is activated, creating a home safety network.
Product 2: Voice alarm with 11 programmable locations tells you where the danger is so you can choose the best evacuation route.
Loud, 85-decibel siren sounds to alert you to danger.
Product 2: Equipped with photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires.
Helps minimize the number of false alarms.
Product 2: Battery powered alarm requires no rewiring for installation and provides continued monitoring even if there's a power failure.
use with Polaroid AA batteries for best results.