Connectivity Technology: Cable | Media Supported: Contactless | Features: Supports 125 kHz proximity technologySmall form factor design.Native CCID implementation supporting PC, thin and zero clients5325 CL backward compatibility.Reads unique number from HID Prox cards.Smart accessories - adhesive plate, screw mount and card holder.Tap-and-go use as well as permanent "card present" mode.Supports WINDOWS, LINUX and MAC operating systems. | Host Interface: USB 2.0 | Color: Light Gray