This is a very very cool item to have at your home. This is the Pulse Oximeter. It will tell you your pulse (obviously) as well as your oxygen levels (always a plus for someone with asthma like me).
It honestly is so easy to use. you simply push the little grey button on the top, and them put your finger in it – and wait. A few seconds later it will tell you the pulse and oxygen levels. There are other displays that you can select to have it show you – this happened to be my favorite one!