¦ Display Format: LCD ¦ 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 &118alue can be shown correctly when pulse-filling ratio is 0.4%. ¦ Interference Resistance Capacity against Ambient Light : Deviation is smaller than ±1% between &#118alue 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.