Features - Extends the distance to your USB device(s) up to 12 meters (36 ) - 4 Downstream USB 2.0 ports - USB specification version 2.0 / 1.1 compliant - Plug and play. No additional driver required - Up to 4 extender cables (UH2120) and 1 Extender Hub (UH2120H) can be chained for a distance of up to 60 meters - Bus powered. No power adapter required - Multiplatform support Windows, Mac Package Contents - 1x 4-Port USB 2.0 Extender Hub