CMS50IW can be utilized before or later doing sports, and it is not recommended to use the device during the process of having sport and etc. Standard of the CMS50IW Pulse Oximeter is as follows: Photoelectric Oxyhemoglobin Inspection Technology is adopted in accord with Capacity Pulse Scanning & Recording Technology, the Pulse Oximeter can be utilized in measuring the pulse oxygen saturation and pulse rate through finger. A pulse rate sound indication Multi time segment storage. The product is suitable for being utilized in family, hospital, oxygen bar, community healthcare, physical care in sports. Screen brightness can be changed and display mode can also be changed. Main Features is miniature in volume, less in weight and convenient in carrying. Process of the product is uncomplicated, low power consumption. The operation on menu for the function has setting with SpO2 value display, rate value display, bar graph display, waveform display and PI display.