Review on BRK Brands HD6135FB Hardwire Battery Safety & Security by Brandon Woodson

I really like this product so far. It's loud enough to hear throughout the house, and it's aesthetically pleasing! One question I asked was if it would work with just a battery and all the replies said it was hardwired and the battery is only for backup. Well, it works fine with just one battery. I didn't want to invest a lot of money wiring in a location that I might have to change if the fire chief doesn't like where I put it. There is no annoying noise with it, only on battery power, it just works. The fire chief even showed me a place in my children's development home.