Brand
CO alarms that name their standard
The COB and COPD state a 10-year limited warranty, and the COPD adds a backlit display.
The older KN-COPP-3 has 28,356 ratings but costs more than the newer COPD.
Everything here comes from the Amazon.com listings of the products below, read from a New York address. Where a listing is silent, the review says so. Prices move, so use the live price on each review.
AA battery · UL 2034 5th Edition stated · ETL listed · 85 dB · test/hush · 10-year limited warranty
The newer Kidde alarm, which names the UL 2034 5th Edition and carries a 10-year limited warranty.
Best for: A buyer who wants the standard named in writing.
≈ $25
plug-in · 2 AA backup · backlit display · 85 dB · UL 2034 5th Edition stated · rotating plug
A plug-in alarm with a CO display, a rotating plug and AA backup, naming UL 2034 5th Edition.
Best for: A bedroom or a stove room with a convenient outlet.
≈ $44
2 AA batteries · electrochemical · 85 dB · LEDs · Event Memory · portable
A small AA alarm with Event Memory, which records the last time it detected CO, with 2,356 ratings at 4.7 out of 5.
Best for: A cabin or travel alarm, or a second alarm at home.
≈ $25
plug-in · 9V backup · digital display · 85 dB · 3rd edition
The older Kidde plug-in with a digital display, a 9V backup and 28,356 ratings at 4.7 out of 5.
Best for: A buyer who trusts a long record over a newer model.
≈ $70
The price beside each product is fetched as this page opens, and it is the only figure here that is current. Any amount written into the prose was read once, on the day that sentence was written, and nothing has refreshed it since.
