It’s $10 a month to cover batteries. I had it for my Mom after she went out of our house @ 3 Am to a neighbors yard, in the rain. It got really cold out that night. She only had her night gown on. About 6am the neighbor saw her when she opened her drapes. Didn’t recognize her & called Police. The EMT CALLED ME.
We also put slide locks at the top of our outside doors.
I HIGHLY RECOMMEND PROJECT LIFESAVER.