Meet the Polar H10 Heart Rate Sensor: an accurate monitor that helps you optimize your training and reach your personal goals. It works with iOS and Android devices and top fitness apps. The new Polar heart rate sensor is waterproof to 30 meters, so it is suitable for swimming. It works with other Polar devices to better serve you.
The device has enough memory space for one training session. It supports HERO4 and HERO5 cameras too. You can order yours in XS-S and M-XXL ranges for $89.95.