❤【Portable & Comfortable】 Light weight, Small size ,Portable. You can put it in your pocket . Perfect for exercise enthusiasts, athletes, and those who need to monitor their blood oxygen circulation and heart rate The ® CMS-50DL Pulse... ❤【Wide range of applications】 The pulse o_ximeter suitable for people of all ages, climbers, skiers, cyclists, pilots or anyone interested in SpO2 and pulse rate in sports, also for children and for monitoring medical data on patient health. Thanks for your understanding., 2., Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object. SMART SENSOR Fingertip Pulse O-ximeter Blood Oxygen Saturation & Heart Pulse Oximeter Vs Blood Oxygen at Savannah Cawthorne blog Users just need to put one of his fingers into the fingertip photoelectric sensor for diagnosis, then the screen will directly show the result clearly. Displaying graphs and numbers makes it easier and faster to read the results. The built-in silicone is very safe and comfortable. Oximeter For Sports Climbing OLED Display Fingertip Oximeter Oxgen Saturation M... - Grandado Heart Rate SpO2 Monitor Your finger won't feel any unwell, even for a long time use.