Kidde Plug-In Carbon Monoxide Alarm #KN-COB-DP-H

This alarm has a "tamper resist" feature which makes the alarm sound if the unit is "unplugged" (fortunately, this can be deactivated, though it's on by default). However, this feature is very poorly implemented. There is a button that sticks out on the back of the alarm which is pushed in when the unit is plugged in. However, if the unit is slightly bumped or jostled, this alarm will sound at full blast even if the unit is never actually unplugged! Earlier today, I was plugging something else in nearby when I grazed the alarm, causing it to go off. My head was only a foot or so from the alarm, and I fear it may have damaged my hearing!

There are several obvious ways to fix this problem. First, they could have set the unit to produce a significantly lower-volume (10-20 dB) sound when the unit is "unplugged." Second, they could have set it to electronically detect that it's not receiving power from the outlet, instead of using the cheap, poorly-functioning button on the back.

I got a great deal on the carbon monoxide alarms and am so far pleased (luckily they havn't had to actually work yet and i'm hoping they won't ever have to) They are good for a little peace of mind!

This is an excellent product and so easy to use. Just plug it in and your done! I got it at an amazing price from kero18, an amazon seller. It was delivered quickly well packaged so I purchased three more from them!

This is an excellent product as there is no maintanence required. Just plug it in and you are safe! Further, You are not troubled with batteries since none are required. Wish my smoke alarm was this easy!

No problems, great price, loud alarm, requires no batteries, alarms when loses power, 5 year replacement warranty.