COROS Heart Rate Monitor - Orange Forerunner 165 Music Originally engineered for extreme conditions

Originally engineered for extreme conditions in the aviation and marine industries

Potassium can help with normal electrolyte balance and magnesium contributes to a reduction in tiredness and fatigue as a result of extended exercise

and an end-to-end cycling training platform at its core

For added peace-of-mind

Simply remove your current watch band and screw on the new band for a comfortable and enhanced fit

COROS Heart Rate Monitor - Orange Forerunner 165 Music Originally engineered for extreme conditionsEasy to wear, nothing to distract. Using optical heart rate sensors, measuring blood flow in capillaries this heart rate monitor gathers data with accuracy. Comfortable and simpler to wear than a chest strap. Easy to adjust the fit and remove the sensor for quick cleaning. Our latest multi channel optical sensor for precise measurement. Up to 3 simultaneous connections with Bluetooth enabled devices. Wear detection allows for automatic device pairing