I am very happy with this product.

I am very happy with this product.  Read Less

Still, i give the product 4 stars because both of those are really just annoyances for me, not especially large problems, and o...  Read More

Still, i give the product 4 stars because both of those are really just annoyances for me, not especially large problems, and otherwise i've had no issues with the product at all.  Read Less

Overall, these are cost-effective smoke detectors and not having to change the batteries regularly or hear smoke detectors star...  Read More

Overall, these are cost-effective smoke detectors and not having to change the batteries regularly or hear smoke detectors start chirping in the middle of the night is definitely nice with the 10-year batteries.  Read Less

I'm not really sure why this isn't marked, but it was a bit annoying to have to actually attach the detector to the bracket fir...  Read More

I'm not really sure why this isn't marked, but it was a bit annoying to have to actually attach the detector to the bracket first to determine how the bracket should be positioned, then hold the bracket in place (on the ceiling/wall/etc.  Read Less

The precharged lithium battery is not replaceable but it has a lifespan of ten years, when the entire detector itself should be replaced.

The precharged lithium battery is not replaceable but it has a lifespan of ten years, when the entire detector itself should be replaced.  Read Less