SY Electronics SY-Apollo-41U 4-port 4K USB & HDMI Mulit-viewer KVM switch with a wide range Scaler to 4K60 4:4:4. The Roaming Mouse functionality offers a convenient and versatile means of control. When in Multu-view, any connected HDMI source can be controlled via attached mouse and keyboard. It features 5x total USB ports – 3x USB 3.0 ports for HD/Camera connection. 2x dedicated HID USB ports permit connection of keyboard/mouse, Multi-View mode – Any of the 4 available inputs can be selected to display in Single, Dual, Triple or Quad view, with various options of window size and PiP where any two inputs can be used to create a customised picture in picture, which includes window size and position. It also has VKA (Video Keep Alive) function to maintain video output when there is no signal as well as Full Audio Control with mute function and control of output volume. Audio can be de-embedded via Toslink or Analogue L/R RCA jacks. Any of the available inputs' audio can be independently selected at any time.