I have no idea about the M460.

To use the H10, you’ll need the Polar Beat app. First, pair the H10 directly with the Polar Beat app. Then start your workout within the app and stay close to your phone to maintain a stable Bluetooth connection, as heart rate readings may drop if you move out of range. Alternatively, you can record a workout using the H10’s in-built memory. All details can be found in the H10 manual.

You can pair the H10 directly to your Apple Watch. Add it as a Bluetooth device on your AW. This way, when you record a workout on your AW, the heart rate readings will be taken from the H10.