Instructions Principle of the CMS50QB Pulse Oximeter is as follows: Photoelectric Oxyhemoglobin Inspection Technology is adopted in accordance with Capacity Pulse Scanning & Recording Technology,the Pulse Oximeter can be used in measuring the pulse oxygen saturation and pulse rate through finger.The product is suitable for being used in family, hospital, oxygen bar, community healthcare, physical care in sports (It can be used before or after doing sports, and it is not recommended to use the device during the process of having sport) and etc. Major Features Integrated with SpO2 probe and processing display module Small in volume, light in weight and convenient in carrying Operation of the product is simple, low power consumption SpO2 value display Pulse rate value display, bar graph display Pulse waveform display The display mode can be changed With measured data overruns limits and low-voltage alarm function Low-voltage indication: low-voltage indicator appears before working abnormally which is due to low-voltage Display format can be saved after power off Small appearance,more fit for children Main performance Display Mode:0.96"Dual-color OLED display Screen Resolution:128*64 SpO2 Measuring Range:0%~100% (the resolution is 1%). Accuracy:70%~100%:±2% ,Below 70% unspecified. PR Measuring Range:30bpm~250bpm, (the resolution is 1bpm) Accuracy:±2bpm or ±2% (select larger) Measurement Performance in Weak Filling Condition:SpO2 and pulse rate can be shown correctly when pulse-filling ratio is 0.4%. SpO2 error is ±4%, pulse rate error is ±2 bpm or ±2% (select larger). Resistance to surrounding light: The deviation between the value measured in the condition of man-made light or indoor natural light and that of darkroom is less than ±1%. Power Consumption:less than 80mA Voltage:DC 3.6V~4.2V Power Supply:Voltage 3.6 rechargeable lithium battery × 1 Battery working hour: The theoretical number is 6 hours Battery working life:Charge and discharge no less than 300 times. Safety Type:Interior Battery, BF Type Accessories Sell in standard a hanging rope a user manual One rechargeable buttony lithium battery Charge accessories: One power adapter, one charger, one data line Physical Identity Dimension:46(L) × 40(W) × 29(H) mm Weight:About 35g (with a rechargeable buttony battery) Color for option: pink, blue, yellow!!!