This item measures your BP and pulse by placing your finger in the hole. It was manufactured in the early 80s 90s and still has the case and instructions. It still works but definitely needs recalibrating. They are no longer used and are now obsolete. Because if age and it has been stored for many years some of the rubber inside has come away. PLEASE BE AWARE I am selling this as an interest piece not as a fully working medical device.
