Features: Reliable accuracy and durability. Voltage indicator, Real-time local-checks. Pulse rate value display, bar graph display Small in volume, light in weight and convenient in carrying. Quickly Measure, your Blood's SpO2 Oxygen Saturation Arterial Hemoglobin Levels, Pulse Rate and Pulse Strength in 10 seconds or less displayed on its large digital red LED display. Sport /Health enthusiasts - For sports enthusiasts like mountain climbers, skiers, bikers or anyone interested in measuring their SpO2 and pulse rate. Widely used in the hospital, health home, oxygen bar, medical community center, alpine area, sports health care etc. (In intense exercise, it affects the extraction of the pulse signal. After the blood pressure measurement is required, the resting position and the pulsed blood oxygen should not be measured as much as possible while avoiding exposure to strong light.) Specification: Material: ABS Battery type: 2 AAA batteries (Not included the battery) Voltage: 2.6~3.6 v Working current: mA 30 Power consumption: <30 mA Measuring range: 70~99% Analysis: 1% Accuracy: ±2% (70%~70%), unknown (≤70%) Measuring range: 30~240 BPM Resolution: 1 pm Accuracy: ±1 bpm or ±1% Color: Black / Blue / Purple / Orange / Green (Optional) Size: 60 x 35mm / 2.36 x 1.38" inch (appr.) Package List: 1 x Finger Pulse Oximeter 1、Reliable accuracy and durability. 2、Voltage indicator, Real-time local-checks. 3、Pulse rate value display, bar graph display Small in volume, light in weight and convenient in carrying. 4、Quickly Measure, your Blood’s SpO2 Oxygen Saturation Arterial Hemoglobin Levels, Pulse Rate and Pulse Strength in 10 seconds or less displayed on its large digital red LED display. 5、Sport /Health enthusiasts - For sports enthusiasts like mountain climbers, skiers, bikers or anyone interested in measuring their SpO2 and pulse rate.