COROS Heart Rate Monitor W 840v1 with a focus on durability

with a focus on durability and grip for road running

allowing you to dash

Heel to Toe Drop: 10mm

4D Guidance System provides innovative protection for every type of runner

featuring a bold silhouette and distinctive midsole design

COROS Heart Rate Monitor W 840v1 with a focus on durabilityComfortable 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 for new workouts. 38 hours of full operation or 80 days in standby mode on a single charge. Rechargeable with a magnetic USB charging cable.