4 Ports USB Manual KVM Switch Box with 4 VGA Cable SetsSpecification: Item Type: KVM Switch Brand Name: OEM Supported Max Resolution: 1920 x 1440 Band Width: 200MHz Interface: USB， VGA Supported OS: Win7 Product Weight: 770g Features: Supports Microsoft smart mouse， Logitech mouse Supports DOS， Win3.X， Win95/98/98SE/2000/ME/XP， WinNT， Netware， Unix， Linux Provides high definition picture， supports maximum resolution up to 1920 x 1440 Supports hog-plugging， with this product， you do not have to turn the KVM power when you want to add or reduce the numbers of PC. Easy to install and operate Package Includes: 1 x 4-Port KVM Switch 4 x KVM Cables