Adesso Compact size PS/2 multimedia keyboard with optical trackball (PS/2,Black)

1.20" 1.60 Lb 103 16.70" 5.90" Akb-320pb Multimedia Keyboard And Optical Trackball User's Guide Fcc Ce Rohs Operating System(s): Microsoft Windows 98 Microsoft Windows 98 Se Microsoft Windows 2000 Microsoft Windows Me Microsoft Windows Xp Microsoft Windows Vista Akb-320pb Akb-320pb Multimedia Keyboard And Optical Trackball Adesso Adesso, Inc Keyboard Not Applicable Ps/2 Quiet Keys Retail Rohs Trackball Wired Yes Www.adesso.com