Compatible with any Bluetooth heart rate-enabled device, the COROS Heart Rate Monitor delivers over 38 hours of continuous accurate heart rate monitoring to track your workouts in distraction-free comfort. Simpler to wear than a chest strap, our soft fabric band lays flat around your arm and locks in place with its textured surface. The low-profile design prevents snagging on clothes or gym equipment, allowing you to forget you're even wearing it.

• 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)