Features: brand new and high quality KVM switches are typically used by one or more administrators to manage multiple computers or an environment where users must operate two or more computers, including network operations centers, information centers, server rooms, software development, Test labs, service centers, departmental LANs, and desktops install multiple computers simultaneously. Excellent picture quality, resolution up to 1920 x1440, bandwidth: 250MHz No software control, you can select the host computer to be operated by the button 4-port manual KVM switch with mini pocket design, easy to use. Multiplatform support - for Windows, for Mac, Linux and for Sun USB mouse port can be used for USB 1.1 hub ad USB 1.1 peripheral sharing Superior video quality - up to 1920 x 1440; DDC2B Specifications: Item: 4-Port Manual KVM Switcher Size: approx 10x6.5x2.5cm/3.93x2.56x0.90in Resolution up to:1920 x1440 Material:ABS Computers Supported: 4 Keyboard Emulation: USB Mouse Emulation: USB Keyboard Input / Output: USB Mouse Input / Output: USB LED indicators: 4 Package Includes: 1PC x KVM Switcher 4 PCS x KVM Cables note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.