Coros Heart Rate Monitor - Black JAK

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 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.
Arm Size: Standard 7.09-12.6 inches (18-32cm) | Large 9.4-16.9 inches (24-43cm)