Just received a replacement because the first one went through 2 sets of batteries in less than a week. Now the second one out of the box doesn’t work at all with batteries and only external power!!!!! Very frustrated

Arrived quickly and in good condition. Overall the alarm is ok with 12 different sounds. Not as loud as I hoped so won't be very useful to hear from 2nd floor when in basement. Strobe is really just a flashing red light so don't be surprised at that. Not like a bright flashing white True Strobe. I would rather it connects to a Google home or smartthings directly instead of another app to download and give access to home wifi and link back. I am sure they are trustworthy being on my network but to be honest.i don't trust that something won't go wrong on their side and expose me.... Oh well it was something to try.....