Hacking a smoke detector and window alarm to use as a geiger counter speaker

[Stonent]

I picked up a window intrusion alarm for $1.00 from dollar tree, and a smoke alarm for $1.99 from GoodWill and stole parts to make a fairly loud speaker on my geiger counter.  Now I've always said Pie-zo and I know some people say pee-ay-zo. So I'm just throwing that out there before someone says I'm saying it wrong.