Questions about Coros Heart Rate Monitor

I have only seen one size here. The circumference of the strap can be easily adjusted.

I have paired this product with a Garmin Fénix 6X, 1040, 1050 as well as a Magene 606. The connection works via BLE (not ANT+). This must be explicitly selected for all devices when pairing. The device tends to be worn on the upper arm. I can't report anything negative about the data quality. The measuring principle seems to me to be the same (green LED). The operating instructions are very sparse ;)

The Coros heart rate monitor is not compatible with Garmin watches that do not support Bluetooth sensors. Garmin watches such as the Forerunner 920 require an ANT+ heart rate strap and cannot connect to Bluetooth sensors. However, the Coros heart rate monitor is designed to work with any Bluetooth-enabled device that receives heart rate data, but this excludes Garmin devices that don't support this technology.

Thank you very much for your comment, I'll get back to you as soon as possible!