... provide , One year warranty , Fast delivery Function:1,Monitoring pulse, SpO2,PR(Pulse Rate).2,Displaying volume and column diagram of stroll ... : 35~99% Resolution: ± 1% Accuracy: ± 2% (70%~99%), unspecified (<70%) Pulse rate Measurement range: 30~255 bpProduct Properties:1 Operation of ... It is apparent the heart rate bargraph display corresponds with pulse rate.