The SANSUI Fingertip Pulse Oximeter is manufactured and designed for sports aviators, trainers, enthusiasts, bikers, mountain climbers, hikers or anyone who wants to obtain their SpO2 on the go! Measures your blood oxygen levels and pulse strength in 10-12 seconds. Taking a reading is easy, just clip it on to your finger and turn it on at the press of a button. The large TFT color display makes viewing the results a snap. Its small size and lanyard makes it convenient and easy to carry around.