Factory LED fingertip oximeter finger clip blood oxygen saturation pulse monitoring

Key Specifications/Special Features:
Product Name: Finger Pulse Oximeter Blood Pressure Monitor With Pulse Oximeter
Dimensions: 58* 32* 33MM (L*W*H)
SpO2 Measuring Range: 70-99% (the resolution is 1%)
Accuracy: ±2bpm or ±2%
PR Measuring Range:30bpm~250bpm, (the resolution is 1bpm)
Resistance to surrounding light:The deviation between the value measured in the condition of man-made light or indoor natural light and that of darkroom is less than ±1%
Display: LED display
Power Consumption: < 30mA
Voltage: DC 2.6V~3.6V 
Power Supply: 1.5V (AAA size) alkaline battery x 2