Technical Parameters ■ Display Format: Color Led display ■ Back light: LED ■ SPO2:35-99% ■ Pulse Ratio:30-250 BPM ■ Pulse Wave: LCD Graphic Display ■ Battery Voltage Low Indication: LCD signals. ■ Power Requirements: Two AA size 1.5V Alkali Battery; ■ Power Consumption: less than 20 mA. ■ 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%. ±2BPM for Pulse Ratio. ■ Measurement Performance in Weak Filling Condition : Oxyhemoglobin and pulse value can be shown correctly when pulse-filling ratio is 0.4%. ■ 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. Packing list: one main unit,one usb charger,one usb line,one packing box; | 
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