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1. Accurate, fast and reliable: fingertip pulse oximeter can accurately test in less than 8 seconds. 2. Detachable box for use to protect the device when not in use, lanyard, convenient to use as a wrist strap or wear on the neck. 3. Sports enthusiasts: For pilots, sports enthusiasts, skiers, cyclists or high-altitude rock climbers, it is a reliable companion for quick and easy reading of oxygen saturation.4. Good quality: This product is made of high-quality materials, exquisite workmanship, very good quality and long service life.5. Portability: This product is small in size and light in weight, very convenient to carry around. Description: Designed for sports and aviation enthusiasts, can be used as a heart rate monitor, does not take much space and can be easily taken away. Oxygen Saturation Tool. Oxygen Saturation Reader.