Product name Pulse Oximeter Features 1.Display mode: LED display2.SPO2 measuring range:35%-100%3.Pulse rate measuring range:30bpm-240bpm4.Pulse waveform display: bargraph display5.Low battery indication: LED display6.Power supply Requirement: 1.5V(AAAsize) Alkaline Batteries�?2;7.Working current:?¤25mA8.Resolution: SPO2 : 1% Pulse Rate: 1bpm9.Accuracy: SPO2 :70%to100%±2digits,below70%unspecified Pulse rate:±2bpm or±2%(select larger)10.Measurement at Low Perfusion: The v of SPO2 and pulse rate can be displayed properly when pulse saturation is at 0.4%.11.Accuracy of SPO2:±4%12.Accuracy of Pulse Ratio.±2BPM or ±2% (Select Larger)13.Resistance to surrounding 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.14.Automatic shutdown function:The device will power off automatically within 5 seconds when there is no finger in the device.  Size  58*30*30mm Package 1pc/ Color box; 100pcs/Ctn; 44*28*20cm; 5.5kg