Display Format: OLED Display SpO2 Measuring Range: 0% - 100% Pulse Rate Measuring Range: 30 bpm - 250 bpm Pulse Wave Display: columination display and the waveform display Power Requirements: 2 —1.5V AAA alkaline battery(or using the rechargeable battery instead), adaptable range: 2.6V3.6V Power Consumption: Smaller than 30mA Resolution: 1% for SpO2 and 1 bpm for Pulse Rate Measurement Accuracy: ±2% in a stage of 70%-100% SpO2 Optical Sensor