Yes, you can, if you are using a software version that was released in October 2017 (or newer). For more information, see sections “COMMUNICATING WITH YOUR PASSENGER” and “UPDATING THE SOFTWARE” in our User Guide (pages 23, 24 and 37).
Note that you can only connect one Bluetooth headset to your NUVIZ at a time. This means that to enable Rider <-> Pillion intercom, you (as a rider) must use your wired NUVIZ headset in order to have the Bluetooth connection available to your passenger´s helmet. In practice, you only need to plug in your NUVIZ wired headset to your NUVIZ helmet mount, and the Bluetooth connection to your passenger´s helmet becomes available automatically.
((And, in the same way, if you unplug the NUVIZ wired headset from the NUVIZ helmet mount, any Bluetooth headset that is connected to your NUVIZ will consequently in practice become the rider’s headset)).
To see the compatibility requirements for Bluetooth headsets, see the FAQ Is my Bluetooth Headset compatible with my NUVIZ?
To see step-by-step instructions for pairing and connecting your Bluetooth headset, see the FAQ How do I connect a Bluetooth Headset to my NUVIZ?
To see which software version corresponds to which software release, see page https://nuviz.zendesk.com/hc/en-us/articles/115001935752-NUVIZ-Software-Releases