The worlds most advanced user-interface XO Smart Link is the worlds most advanced user-interface for dental units, and is available exclusively as standard equipment for the XO 4-6 dental workstation. XO Smart Link is a software solution running on a PC connected to the unit. The software greatly expands the functionality of the unit, by providing the means for applying optimal dynamic instrument parameters, using the concepts of "Instrument programs" and a complete hands-free solution for interacting with other software, running on the same PC. XO Smart Link is an open-ended system, allowing it to be continuously upgraded with new features, in the form of plug-ins, and allows for complete customization of all aspects.