The fingertip Oximeter can be used to measure human Hemoglobin Saturation and heart beat through finger. The product is suitable for use in family, hospital (including clinical use in ternist/surgery, Anesthesia, pediatrics, intensive care and etc), Oxygen Bar, social medical organizations, physical care in sports. -- Product Operation Scope 　　The fingertip Oximeter can be used to measure human Hemoglobin Saturation and heart beat through finger. The product is suitable for use in family, ospital (including clinical use in ternist/surgery, Anesthesia, pediatrics, intensive care and etc), Oxygen Bar, social medical organizations, physical care in sports (It can be used before or after sports. Continually monitoring is not commended). -- Technical Parameters 　　* Display Format: LED 　　　SPO2:35-99% in two-digit 7-segment digital; 　　　Pulse Ratio:30-240BPM in 3-digit 7-segment digital; 　　　Pulse Wave: 6-segment bargraph; 　　　Battery Voltage Low Indication: LED signals. 　　* Power Requirements: Two AAA size 1.5V Alkali Battery; 　　* Power Consumption: less than 40mA. 　　* Resolution: ±1% for SPO2 and ±1 BPM for Pulse Ratio. 　　* Measurement Accuracy: ±2% in stage of 70%-99% SPO2 and meaningless when stage being smaller than 70%. ±2 BPM for Pulse Ratio. 　　* Measurement Performance in Weak Filling Condition: Oxyhemoglobin and pulse value can be shown correctly when pulse-filling ratio is 0.5%. 　　* Interference Resistance Capacity against Ambient Light: Deviation is smaller than ±1% between value of Oxyhemoglobin measured in natural lighting indoor condition and present lighting sources and that measured in dark room. 　　* It is equipped with a function switch, hrough which the Oximeter can be automatically powered off when no finger is in the Oximeter more than 8 seconds. -- Product Properties 　　* Operation of the product is simple and convenient. 　　* The product is small in volume, light in weight (total weight is about 50g including batteries) and convenient in carrying. 　　* Power consumption of the product is low and the two originally-equipped two AAA batteries can be operated continuously for 30 hours. 　　* Low voltage warning will be indicated in visual window when battery voltage is so low that normal operation of the Oximeter might be influenced. 　　* The product will automatically be powered off when no signal is in the product for more than 8 seconds.