High-Definition and Clear OLED Display -- Improved and updated, the pulse oximeter presents you reading data on vivid and sharp OLED display.Cost-effective -- The very unique pulse oximeter fingertip comes with high quality protective case, you don't have to pursue another case to hold it. Each package includes: 1 x branded pulse oximeter, 1 x Protective case, 1 x Hook, 1 x Lanyard, 2 x AAA battery, 1 x User manual. Reliable and durable.Shooting Your Trouble -- Designed and innovated for sports fans like mountain climbers, skiers, bikers and people who need or is interested in measuring their SpO2 and pulse rate easily. Portable and compact size for easy carrying, and accommodates wide range of finger size from young people to elder.Accurate, Reliable -- innovated fingertip pulse oximeter provides accurate and reliable measure method for oxygen level in the blood and reads the pulse rate data and O2 saturation within 8 seconds. It is highly recommended to use the device in a stationary condition while not in motion for accurate reading data.Important Notice: This pulse oximeter fingertip isn't for medical use, intended use for data monitor of blood oxygen saturation level at home, sports or aviation use only, for athletes and seniors. Ideally suitable for mountain climbers, skiers, bikers, aviators.