anyone can use this, no matter your medical knowledge. It is easy to use, and the information can help patients when at home, to report to doctors (in general).
It is fast & responsive. It is suppose to be better at low perfusion patients to be able to read, but i haven't tested this yet. It is adjustable in brightness, and easy to read. It has 6 different modes to view the screen. Even if you don't know how to use the graph, the pulse oximeter is still very useful. I would recommend this to everyone. This unit does not have sound. I gave one to my mother with heart problems. I gave one to my mother in law with congestive heart failure to measure her oxygen levels. I gave one to my brother in law with atrial fib, to see his heart rate. I use it with my asthma when i exercise or I am sick. Very useful, not just for the medical profession.