Easily share two USB devices between four PC and/or Mac desktop or notebook systems. RoHS compliant - 1.Designed for USB devices including printers, scanners, hard disk drives, cameras, CD-ROMs, zip drives, hubs and more. Note Not designed for mouse or keyboard .2.Supports device switching via Hot Keys (Windows only), software (Windows only) or manual switching buttons .3.Power LED/selection indicator .4.Compliant with USB Specification, rev. 2.0.5.Hot swapping feature allows you to connect/disconnect USB devices without first powering down your system .6.Low power consumption-powered from the system. No power adapter required