Heart Rate While Swimming
The device is intended for surface swimming. Scuba diving with the device may damage the product and will void the warranty.
The device has wrist-based heart rate enabled for swim activities. The device is also compatible with the HRM-Pro™, HRM-Swim™, and HRM-Tri™ accessories. If both wrist-based heart rate and chest heart rate data are available, your device uses the chest heart rate data.