Hi @mrstruijk, The Tobii Unity plugin is designed to operate with the Tobii Tech range of eye trackers such as the 4C and EyeX all of which are USB based.
Accordingly whilst the Unity plugin may work for the X3-120 operating under a powered USB connection, there is no support available or planned for networked eye trackers as is typical with Tobii Pro devices.
Our apologies for any inconvenience caused.