Trust Wireless Optical Deskset DS-3300X BE. Device interface: RF Wireless. Keyboard dimensions (WxDxH): 481 x 172 x 27 mm. Minimum processor: Pentium, Minimum RAM: 64 MB, Minimum hard disk space: 40 MB. Battery type: 2 x AA (keyboard) & 2 x AAA (mouse). Minimum system requirements: PS/2, CD-ROM, Windows 98/ME/2000/XP, ACPI, Microsoft Office, Internet Explorer., Compatible operating systems: Microsoft Windows 98/ME/2000/XP