Pro Wireless 2.4GHz Optical Mouse Keyboard Combo Set Features: Up to 10m working distance 2.4GHz 2way fast digital RF 16 auto hopping channel with 65K ID Reliable keyboard with spill-resistant design Stand-profile keys provides comfortable silent touch Long battery life Micro receiver System Requirement: IBM PC or compatitable Available USB port Windows 2000/XP/VISTA Note: USB receiver can be located in the mouse battery compartment