Specification:Hemoglobin saturation display 35~100%Pulse rate display 25~250BPMResolution Hemoglobin saturation:1% Pulse rate:1 BPM Hemoglobin saturation:2%(80%~100%)Measure Accuracy 3%♀：70%~80%♀? Pulse rate:2 BPMOperation Temperature 5??~40??Storage Temperature -10??~50??Relative Humidity 15%~80% non-condensingPower 2?│AAA1.5V BatteryDimensions 57mm(L)?│31mm(W)?│30.5mmD)Package Content: 1 x Fingertip Oximeter1 x Lanyard1 x English user's manual