Master-IT USB+ uses breakthrough technologies which allow for flexibility and functionality never before seen in a KVM switch. The built-in USB DDM prevents interruptions in communication between shared devices and connected systems /computers. By DDM technology, switching ports without any lag time occurred can raise the efficiency and compatibility of KVM switch. UR-12-PLUS+ embedded DDM Technology can 100% maintain the compatibility of the shared devices and connected systems. UR-12-PLUS + becomes the most reliable and robust KVM switch in the world. Currently DDM Technology can be implemented for USB HID class devices only, but in the future will be expanded to cover all major types of USB devices.