... low indication Four directions and six modes Features:Integrated with SPO2 probe and processing display moduleCan be used in:hospital, ... home,community medical treatment,sports healthcare,etcCan measure SPO2 and PR accuratelySPO2 and PR display,PR waveform and bargraph ... 160*64Spo2:35-99% Pulse Ratio:30-250BPMResolution:1% for SPO2,1BPM for pulse ratioAccuracy:±2% (70%-99%),unspecified(<70%) ...