This 4 USB+PS/2 KVM Switch offers a professional-grade computer management tool that allows you to control up to 4 directly connected computers from one source, with support for display resolutions of up to 1920x1440 - a perfect solution for high-res applications. A versatile KVM solution, the switch can be used to control computers that support either USB or PS/2 connections (mouse, keyboard), and offers a scalable method of managing connected systems using cascaded installation (using multiple KVM switches). Offering broad compatibility, the KVM switch is designed to work with Dell, Compaq, IBM and HP servers and all PC notebook computers, ensuring a smooth and reliable operating experience. The KVM switch features a durable all-metal body that is suitable for virtually any operating environment including corporate or industrial operating applications. This professional-grade USB+PS/2 KVM Switch provides reliable computer management and is backed by StarTech.com's 3-year warranty.