This Finger Pulse Oximeter is great for monitoring your blood oxygen levels and pulse rate. Simply plug your fingerpad onto the sensor and see the readout on the LCD display. The blue number is your pulse, and the red is SpO2, the estimate of the amount of oxygen in your blood. https://elecena.pl/product/17502637/finger-pulse-oximeter 2021-04-07 https://elecena.pl/product/17502637/finger-pulse-oximeter 2021-11-28 https://elecena.pl/product/17502637/finger-pulse-oximeter 2024-04-02 https://elecena.pl/product/17502637/finger-pulse-oximeter 2024-11-14