very little 4k content is available without downloading it, 1080 is best that Sly supply via the sat cable & VM 2160 max on the VM cable, 4k content is normally sent via your net connection rather than the physical feed to the property, the best we can get from our 4k boxes is a 1080 or 2160 source upscaled by the box to gain a better image, however IF you do manage to find any true 4k content it does look amaizing!