This Oxygen Saturation Oximeter will give you the accurate reading you want. With a compact size, it goes in a purse or bag to check your blood oxygen levels anytime. The portable pulse oximeter has an LED Finter SPO2 monitor that is easy to read. It is simple to clip over your finger and operates quickly. The monitor comes with a convenient carrying case that allows you to stay organized. It has a handy lanyard as well, so you can even wear it around your neck if desired. It uses low power to operate.