... holder ecginstructionsIt is a kind of multi-functional mini patient monitor. It integrates the functions of auscultation,ECG collection,SpO2 ... and PR inspection.The ecg monitor is applicable for family, hospital, private Clinique, community medical ... heart rate,SpO2 ,pulse rate ,pulse waveform 3.Earphone output and 16 steps volume adjustable4.Alarm for SpO2 and pulse ...