Superior video quality – up to 4K DCI (4096 x 2160 @ 60Hz) and built-in 2-port USB 3.1 Gen 1 hub with SuperSpeed 5 Gbps data transfer rates, Video DynaSync™ – an exclusive ATEN technology that eliminates boot-up display problems and optimizes the resolution when switching among different sources, Cascadable to two levels – controls up to 256 computers, Multi-Display feature – stacks up to eight CS18216 units and display video from up to 8 monitors (dual display / triple display / quad display / multi-display)