My dad lost his car keys...he’s not even sure they’re in the house. He was using the metal detector in the yard. I got him a tile tracker it uses bluetooth to track things like keys ...he’s probably going to complain but it uses an app to activate like a chip you attach to things and it sings a little song when you activate from the app. Pretty handy. I figure they can attach it to my moms set so they don’t lose both. I mean they’re getting older and little things like these start to happen.