Product:  Pulse Oximeter (P1329)
This fingertip pulse oximeter is designed to measure Oxygen Saturationand Heart Rate through the finger, here is the feature list.

• Oxygen saturation (SPO2) measurement
• Pulse rate (PR) measurement
• Power supply 2 x AAA alkaline battery, with battery level indicator
• TFT display (0.96 inch)
• Auto shut down to save power
• Accurate PR and SPO2 data reading (refer to below)
• Battery life (more than 4000 cycles)