Smartwatch Spo2 Polar Vantage V3 Night Black S-L OLED Display 24/7 Activity Tracking Sleep Analysis Long Battery Life```html Product Highlights The evolved heart rate sensor "Polar Elixir" has further advanced Polar's unique "Polar Precision Prime" optical heart rate sensor, enhancing both accuracy and functionality. The new "Polar Elixir" reduces errors caused by arm and wrist movements by improving the sensor's structure and updating the algorithms. With a beautiful display and fast speed, the organic EL display shows images clearly at the highest resolution in