My dad died in this house in 2020. Some strange things happened over time. I am living here w my mom, older bro and kid. My mom was talking to my sister about him one time and it made noise. It also made a noise exactly one month after he passed away. Another time my mom said she heard it make a noise on may 25 (my kids pre k graduation day). She sent me a text that day so I have record of it. Another time was my brothers birthday. I was up at 7:20 and 10 mins later it alarmed 6 times and stopped. And no it doesn’t need a battery replacement these are the kind that last for years. We both heard it. No one was cooking, taking a shower. No activity. Another time it was my mom’s anniversary and we left and came home and a light cover was resting on the tables edge. No one can take it off without standing on the table, no one’s agile enough to stand on top of the dining room table. And if it fell it would have disturbed the plant on the table as well ????