Model: CS50DL - Color: Blue - Material: ABS - Quantity: 1 - Display screen: 1.2" - SpO2 measurement performance: - Measuring range: 35%~100% - Resolution: 1% - Accuracy: 70%~100% +/- 2% - Optical sensor: Red light (wavelength: 660nm) Infrared(Wavelength: 880nm) - Pulse measurement performance: - Measuring range: 30bpm~250bpm - Accuracy: +/- 2%bpm +/- 2% select larger one - Pulse intensity range: continuous bar-graph display the higher display indicate the stronger pulse - Power supply: 2 x AAA batteries (Not included) - Working time: 20 hours - Power: - Voltage: DC3.0V - Safety standard: Class II B - Suggest using it before or after sports NOT during sporting - Be automatically shutdown after the finger out off machine 5s - Packing list: - 1 x Pulse Oximeter - 1 x English user manual - 1 x Strap (Length: 40cm)