Review on White Hardwired Smoke Detector BRK 7010B with Photoelectric Sensor and Battery Backup by First Alert by Jake Davies

I thought they had the same mount as the old ones which was one of the reasons I bought them but the wiring harness and mount were completely different so that's what ended have to replace everything. It wasn't a big deal, but for those who think you can just pull out the old one and put this one in. Make sure you compare the wiring harness to this one or you'll have to switch out the switch and completely remove the old one and install these. Once installed and tested they were good, no more weird tweets out of nowhere at 2am!