● Wireless inter-connectivity, wirelessly connect up to 18 interconnect alarms in your home and when one sounds, they all sound for increased whole-home protection.
● 120v ac hardwired, easily replace one existing hardwired alarm with First Alert SA521 alarm and then add Wireless Interconnect battery operated alarms to connect wireless alarms with hardwired alarms--when one sounds, they all sound.
● Battery backup, provides consistent protection for added safety during power outages.
● Photoelectric smoke sensing, optimal protection from smoldering fires. plus, reduces false alarms like those caused by cooking fires and shower steam.
● Mute button, mutes unnecessary alarms immediately. also tests alarm function with same button.
● Eco-friendly, completely recyclable as an electronic device.
● EZ access battery door, no need to remove alarm from ceiling to change battery.
● Optional theft-prevention lock, when activated, batteries and/or alarm cannot be removed without proper tools.
● 2AA batteries included.
● Loud 85db alarm.
● 10-year limited warranty.
● Smoke alarms should be replaced every 10 years for maximum protection.
● Meets UL217 standard.
● FCC compliant.
Average Customer Rating Based on 31 reviews:
Works everytime - 01/21/2016
Reviewer: Charles Hinton
I have purchased many of these and they always work. Easy to program.
Easy to install - 10/22/2015
Reviewer: Brent Brickett
This product was very easy to Install and works great.
Reviewer: Patricia Swiger
I really like the product!!
Reviewer: Raymond Rodriguez
Very easy installation with clear instructions .
Reviewer: Patricia Shewmake
Peace of Mind - 03/25/2014
Reviewer: Francis Marino
I am very happy with the onelink smoke detectors. They are easy to program and I like the feature where all will sound when one detects smoke.
Onelink easily interfaces with existing detectors - 11/24/2013
Reviewer: Basil Jones
I easily found the information I needed to make my purchase decision for replacing my old detectors and expanding with additional detectors. I didnt realize they needed to be replaced after 10 years and I bet most people dont. If one of my original wired detectors hadnt failed, I probably still wouldnt know. Ordering was easy and I received the detectors I ordered in just a couple of days. My only complaint is that the detectors are a bit pricey. They were very easy to install and set up.
Reviewer: Gail Thompson
It works great with our other hard wired alarms.
Reviewer: Terremce Townsend
Very easy to install, program and test. Well worth the money.
One link wireless - 04/02/2013
Reviewer: Jason Few
This product is awesome. All I had to do was run one circuit for this smoke and get battery smokes for the rest of the house. Fast, easy, and worth the money.
Q: What is a mesh network and how do the First Alert Wireless Interconnect smoke detectors intercommunicate?
A: First Alert Wireless Interconnect smoke alarms operate on a "mesh network" to integrate smoke alarms for better safety and response in an emergency. All of the First Alert Wireless Interconnect alarms send, receive and resend the initiating alarm's signal. Why is this important? Let's say the signal is blocked from reaching the master bedroom alarm either by distance or some obstruction in the home. With First Alert Wireless Interconnect, the mesh network of alarms re-routes and re-sends the signal via the other alarms, providing a greater chance all alarms will receive the signal. The "mesh network" is a more reliable means of wireless communication.
Q: What is the proper placement of smoke alarms?
A: It is important that you have the proper placement for your smoke alarms. Install your alarms at least 20 feet from appliances like furnaces and ovens, which produce combustion particles. Alarms should be at least 10 feet from high humidity areas like showers and laundry rooms, and at least 3 feet from heat/AC vents. Be sure to install a smoke alarm in each bedroom, one at the top of each stairwell, and one on every level.
Q: My smoke alarm keeps chirping and beeping. Why does my smoke alarm chirp intermittently?
A: It is likely that the reason your smoke alarm keeps chirping and beeping is that the battery is low. Whenever your smoke alarm keeps chirping, replace the battery immediately.
Other reasons include: It could be a different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded. The orange interconnect wire should NEVER be grounded; it should only be used to interconnect other smoke alarms or compatible devices.
Q: Why doesn't my smoke alarm sound when I push the test button?
A: It is important that you frequently test your smoke alarms. When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound:
Q: Why does my smoke alarm go off when I install a battery or turn on the AC power?
A: It is normal for smoke alarms to go off and sound briefly (up to 5-10 seconds) when you install a new battery or when they are powered up. If the alarm continues to go off and no smoke is present, the cause may be one of the following:
Q: My smoke alarm keeps chirping, even with a new battery. What is causing this?
A: There are a number of possible causes for your smoke alarm to keep chirping even with a new battery.
Q: I lost my First Alert smoke alarm owner's manual. How can I get a new one?
A: First Alert smoke alarm owner's manuals are available online for download at no cost. Find your alarm in our Smoke Alarms section.
Q: Why does the National Fire Protection Association (NFPA) recommend that home smoke alarms be replaced after 10 years?
A: Smoke alarms have a limited life. Although each smoke alarm and all of its parts have passed many stringent tests and are designed to be as reliable as possible, any of these parts could fail over time. Therefore, you must test the devices weekly. The unit should be replaced immediately if it is not operating properly. The performance of smoke alarms older than 10 years is simply not reliable. To ensure your family's safety, all carbon monoxide and smoke/CO combination alarms need to be replaced every 5-7 years. All smoke alarms need to be replaced every 10 years.
If it's time to replace your alarms, consider the NEW 10-Year Life series and never have to worry about a battery replacement for the life of the alarm.10-Year alarms are available in smoke,carbon monoxide and combination alarms.