Walmart has a discount smoke detector for #3.97. I know. I bought one for myself today for the hall, and spent 10.97 and got the one with the light, for over the bed.
The four dollar one came with a junk battery, need alkaline 9 volt cell, sold separately.
Knowing that most people put em on the shelf and ignore them, please offer installation with the present. I used two drywall screws and a cordless drill to install mine.
. Christopher A. Young learn more about Jesus .