It would be very difficult to know if this detector would work or not. but it shows it works and I didn't die of carbon monoxide poisoning so I believe it works. The fact that the battery lasts 10 years and I don't have to deal with pesky alarm clocks in the middle of the night to change the battery is very nice to have. I glance at it from time to time to see the little blinking LED showing it's still on. after months and months. still blinking.
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