Work's fine no problems !
582150
Works as intended, replaced USI-1208. I decided not to upgrade to CO2/Smoke detector model as people were reporting some false alarms .
4908274
No problems, works fine for our use and it was what our tech told us to order. Still working after several months of use.
2033736
What you see is what you get, works very fine, No problem whatsoever.
2371728
Yes! No problems here! Works great easy install.
2451015
bought it 2 years ago and still working with no problems at all!
1529843
So far they have been working with no problems. Would probably buy again if they continue to work for an appropriate amount of time.
2823665
Works great! I have nothing bad to say about it.
1758689
Direct fit and everything works great! No issues.
1068685
Works perfectly!  No problems after a year of use.
189107
Easily installed.  No compatibility issues.  Working as advertised.
81118
I plugged it in and it worked. No snafus. No problems. No error messages. What more could you want?
:)
2853896
Easy to install, has been working fine every since.
75402
works fine .. no problem with them at all .. i don't see why you have to pay for the original one
3195874
served the purpose, he says it works great, no problems! thanks!!
3984303
No problems at all. Works fine. packaged  secure.
1549278
Economical and works as expected!! What more do you want?  :)
920838
Works as advertised. Had no troubles at all.