Found process to connect alarms easy. Quality of screws poor as kept breaking so used my own.
Iβve had these smoke alarms installed for a few weeks and they are working well thus farβ¦and great service.
I bought two of these last year and now they have started randomly going off in the middle of the night and will need replacing. Very disappointed!
Have tried other smoke detectors and they often don't last anywhere near the time they should.