I’m a nurse practitioner and have now purchased 3 of the Santamedical pulse oximeters for my practice. I absolutely love them! They are more sturdy than the pulse oximeters we use in the hospital. The readings are quick, easy to read, and accurate. It’s very easy to use including battery change. It’s lightweight and portable and comes with a strap that can be attached or easily detached if needed. I love this device!