The Kato 305 Syncro3 version based on communication between actuators through a direct connection allows instantaneous control of the force, speed and resistance of each actuator through an encoder reading of the work of the individual motors. The continuous exchange of information allows the actuators to open and close in synchronization. Syncro3 is the evolution of the first patent that provided for installation and wiring of a maximum of two motors connected directly to one another. Today the Syncro3 software allows connection of up to 8 motors directly to one another without the need for external synchronization control units. The number of actuators to be included on the frame in Syncro3 function varies according to the dimensions, weight and type of the frame itself. For a width of more than 1200 mm the use of two motors is already recommended in order to allow correct movement and perimeter seal of the frame when closed. An additional actuator is recommended for every additional 1200 mm of width.