Converts USB port to two PS/2 ports Supports two PS/2 devices Simultaneously (keyboard & mouse) Easy to install, no external power supply required Compatible with USB v.2.0 and 1.1 Cable Length: 30 cm Compatible with: Windows® XP/VISTA/Windows® 7/8, NetWare, Unix, MAC OS 8.6 or higher. Also works with Sun Microsystems and HP Server computers System requirements Before installation, please make sure all peripherals and computers have been turned off Connect PS2 mouse to the green mini-Din connector. Connect PS2 keyboard to the purple mini-Din connector Plug the adapter into the USB port of the computer «Add new hardware» wizard will appear on the screen. Please, follow the instructions of the wizard to install the necessary drivers