Отзыв о Отслеживайте уровень кислорода и сердечный ритм с помощью Измерительного пульсоксиметра "IProven" для кончика пальца – в комплекте батарейка, футляр и подвеска на шею, синий цвет. от Jermaine Rhodes

All three were very good. but this one I like the most. It has a hinge that height adjusts for the finger size and it is easy to line up the laser to shine through the finger nail. Something that give me apparently more accurate readings. This model and a second model give me the same exact readings. I like that the digits face me and not upside down. I also like the look and feel of the plastic. It is more comfortable and easy to see on the end table or bed. This one is more medical while the other seems more athletic. The battery bay has the battery direction properly orientated if that makes sense to you.