Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: where do you install these in the home - how many would you need for a 2 story 3 bedroom home?
Document: These are easy to install and avoid the need for separate detectors for smoke and carbon monoxide (CO). They are sensitive enough to do their job without false alarms. They look attractive and unobtrusive. The test button is easy to locate, as are the indicator lights for each type of alarm. They are loud enough to be heard throughout my home. As a general good practice, I test each unit every month. Shockingly, many homes don't have working smoke detectors and even more don't have carbon monoxide detectors.
Twice in this month, in the news, two families lost children to home fires and a child was found dead in my town due to Carbon Monoxide poisoning. How devastating! Although my home has working builder installed fire alarms, I wanted the extra security of the CO alarm. I bought 4 (one for the fireplace area; which is gas) and now I have many fire/CO alarms throughout my home (and of course one in each bedroom).
The product was as advertised, and arrived at my home quickly. Products are easy to install, and appear to work properly. Hopefully, I'll never need to see how well they work in an emergency.
Excellent 2 in 1 protection, installed in 5 minutes. Gives me peace of mind in my older home. Instructions are clear on where best to install for each room.
Nice product, easy to install seems to be working as described (at least first month or may be 6 weeks and only when I was checking the batteries, never went off as a real alarm). I bought 2 and found them to be couple bucks less expensive than similar model, that had a voice alarm, though, that I bought at Home Depot. Anyway, I can recommend it as a good buy for sure so far.
with the threat of carbon monoxide from furnances or gas fire places ( if you have one) this gives you piece of mind knowing that you are protected. Have not had any flse alarms and have 2 of this installed in my home. Have used these as replacement and would recommend.
I purchased 4 of these and all 4 have given off the random 3 chirps (infrequently but...) indicating that I need to replace the alarm. Not worth the money.
This is a must for your home ,need I say more, these things will save your life,well worth every penny.
product easy to install and outsde of the tests for operation listed i have no way of knowing this unit will work i say this tounge in cheek i hope i never need proof of operation i am satisfied with price and product
I have had no problems from this model so far.You install a Smoke Alarm and just count on it to work when it is supposed to.I got this one to replace a talking unit I had that started testing itself and wouldn't stop.These alarms & detectors do need to be replaced, and are not meant to last forever.
Answer: yes