Overview the el 31sy switcher allows the user to input three hdmi sources and switch between these sources to provide a single hdmi output to a display this switcher can be controlled via the supplied remote control or by using the input switching button on the front of the device specification v13 hdmi hdcp 11 and dvi 10 compliant hdmi 3 way switcher resolutions supported pc vga svga xga sxga uxga wuxga 1920x1200 hdtv 480i 576i 480p 576p 720p 1080i 1080p and 1080p24f