Support resolution up to 4K*2K@30Hz     Support all kinds of USB device, such as U disk, USB printers, USB keyboard and mo     Cables on the switch button can be extended up to 50meters     Cables built in the switch, no need for extra components     Plug and play, no need any settings.          Model: bw-21uhb     Product Name: KVM switcher     Switching: key switching     Drive: drive free     Hot plug: support     Resolution: 4K* 2K@30Hz     Rated voltage: AC 250V     Insert material: nickel plated brass     Outer cover: flame retardant PVC material     Scope of use: office, home entertainment     Colour: blue     Material: PVC     Size: 8 x 4 x 5CM          Package Contents:     1 x KVM switch          Only the above package content, other products are not included.     Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.