Buying First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup low price
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List Price : $75.99
Price : $48.27 on October 10, 2012
Amazon.com Product Description
In the event of a fire every second counts. If a fire were to begin in your basement and the alarm there sounded, you may not hear it right away if you're sound asleep two floors up. With traditional battery-operated alarms, you lose valuable time waiting for the smoke to rise to another alarm, on another level, before the alarm on your floor sounds. But with First Alert ONELINK alarms, if one detects danger, they all sound. This can alert you sooner, and it increases your chances of getting out safely.
Until now, alarms that could signal each other were only available in homes with hardwired alarms requiring installation from an electrician. But First Alert ONELINK alarms communicate without wires.
The First Alert ONELINK SA501CN alarm uses photoelectric sensing technology which is environmentally friendlier and which reduces nuisance alarms, making it ideal for cooking areas. It is also great for sensing slow smoldering fires quickly. The alarm includes a low battery warning and a super bright escape light. You can easily expand an existing interconnected 120-volt AC system by replacing one alarm in the series with this alarm. The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. The AA batteries are easy to install in the convenient pullout battery drawer. Two AA batteries included.--Bree Norlander
What's in the Box
One smoke alarm, two AA batteries, and user's manual
- Hardwire, interconnected wireless smoke alarm with battery backup
- Uses photoelectric sensing technology which is environmentally friendlier
- Low battery warning; simple to use silence/test button; pullout battery drawer
- Add additional battery operated First Alert ONELINK alarms to expand without wires
- 120-volt with 2 AA battery backup
| 12 of 12 people found the following review helpful  Unpredictable?, This review is from: First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup (Tools & Home Improvement) I have 7 of the First Alert SA520 Onelink units that were installed in my home 2.5 yrs ago. They were easy to set up although getting power to each unit in an older, 3-story home was the biggest challenge. They link to each other well. You may wish to install them in a particular sequence if using many of them on different floors. That way when the first one goes off, you might have a fighting chance of knowing which one it is since that one sounds off first. The reason I say this is because ours have begun going off in the middle of the night for no apparent reason. It has happened 4 times in about 4 months, and we never know when it will happen. They start sounding the alarm but shut off after about 20 secs, by themselves. We thought we had one defective unit but after removing it several days ago, they went off again tonight (6pm). All the other times have been when we were dead asleep, and boy is that a shock! These units are LOUD!Gave it four stars for loudness... Read more 11 of 12 people found the following review helpful  Must Have for Older Homes, Amazon Verified Purchase This review is from: First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup (Tools & Home Improvement) Our home was built in the late-70's so we had a hardwired smoke alarm on each floor but they were not interconnected, not to mention they didn't have a battery backup. If we were sleeping, could we expect to hear the alarm on another floor, on the opposite side of the house? That's a bet I'm not willing to take, so we spent the extra money on two of these. We also plan on buying a couple of the battery only ONELINK alarms to expand our safety and coverage without hiring an electrician to install.To program, you insert batteries and close the battery door on one unit; then you insert batteries on the second unit, press a button on the second unit, then press a button on the first unit. Inserting batteries and programming took under two minutes for two alarms. My (getting better but still not what I'd call "handy") husband had the alarms installed in under five minutes each. So, I'd consider them pretty easy to install. During testing, they communicated well together... Read more 4 of 4 people found the following review helpful interlinked without expensive wiring,  |
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