The Shokz OpenFit 2+ does not offer active noise cancelling for music or surroundings. Only the microphones have intelligent noise cancellation for clearer calls.
Yes, the connection is via Bluetooth. To pair the headphones, open the charging case to activate Bluetooth pairing mode, then select "OpenFit 2+ by Shokz" from the list of available Bluetooth devices.
As far as compatibility with the Rodecaster Pro 2 sound card is concerned, this must have a Bluetooth function in order to connect wirelessly to the headphones. If the Rodecaster Pro 2 supports the standard Bluetooth connection for headphones, the connection will work. However, it is important to check that the sound card supports the appropriate Bluetooth audio profile (such as A2DP) for optimum compatibility. The headphones also support multipoint connection via the Shokz application, which can make it easier to manage multiple devices.
In summary, Bluetooth connection is well supported, but functional compatibility with the Rodecaster Pro 2 depends on the latter's Bluetooth support.