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¡æ~40¡æStorage Temperature -10¡æ~50¡æRelative Humidity 15%~80% non-condensingPower 2¡ÁAAA1.5V BatteryDimensions 57mm(L)¡Á31mm(W)¡Á30.5mmD)Package Content: 1 x Fingertip Oximeter1 x Lanyard1 x English user's manual