A pulse oximeter measures the oxygen saturation level in a person's blood. This fingertip model is a convenient, non-invasive measurement instrument. Simply place your finger on the sensor and the pulse oximeter automatically turns on and performs the analysis in seconds. This unit also features an "auto-off" function that turns off the device when not in use. This device also measures pulse rate. It is ideal for medical diagnosis and fitness purposes such as running and exercising.

Uses 2 AAA batteries, included