Meet Chip my new sanity saver ! 
Chipolo 1 Item Finder.

I've been thinking of one of these as I keep mislaying my key, mainly as I only carry one. I like things small and neat. Kept putting it off ... don't need it, just don't lose it etc but it came to a head on Friday trying to leave to go away in the motorhome. Key fell out of my pocket in the motorhome and we spent half an hour frantically searching. The thought of going away with the keys missing, possibly outside, was horrible and when we found them I decided it was time to bite the bullet. It's always when you are in a rush to get out and it happened again this morning going to yoga, before this arrived. Hopefully sanity will return lol