MCP Fingertip Pulse Oximeter is manufactured according to international standards set for pulse oximeters used by doctors and other health professionals. Designed for pilots or any sport enthusiasts who want to obtain their SpO2 (Blood Oxygen Saturation Levels) and PR (Pulse Rate) on the go, the pulse oximeter OLED display faces the user so that the user can read it easily. Taking a reading is easy, just clip it on to your finger and turn it on at the press of a button. The large OLED display makes viewing the results a snap. Its small size makes it easy to carry around and a lanyard is also included for added convenience. Comes with 2 AAA batteries so that you can use it immediately upon arrival.