I saw Aunt K using something dead cute when she was here. They just left today. It was a pulse oximeter she told me. A little instrument that measures your pulse but you only need to insert your finger.
Get your mind out of the gutter.
Or maybe its my mind in the gutter 
But anyway it was cute and it serves a function for her because she wasn’t feeling too good and was told to monitor her health. Couldn’t see what was wrong with her though. She still ate like a horse