Finger Pulse Oximeter - Black + Gray (2 x AAA)
Wave shape: Yes; Battery: 2 x AAA alkaline batteries (not included); The measuring range of oxygen saturation: 0~100 (70~100% accuracy: +/- 2%); Pulse rate: 30~250BPM (Degree of accuracy: +/- 2% within 30~250BPM); Atmospheric pressure: 86kPa; Working temperature: 0'C~45'C; Storage temperature: -20'C~+60'C; Relative humidity: 30%~95% (working) 10%~95% (storage)