The Zacurate Fingertip Pulse Oximeter is manufactured according to the standards set for sporting and aviation pulse oximeters. Our product is designed for sports enthusiasts, pilots or anyone who wants to obtain their SpO2 (Blood Oxygen Saturation Levels) and PR (Pulse Rate) on the go or at home. The pulse oximeter LED display now 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 LED 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. This device is for Sports & Aviation use only and is not a medical device.