Fellowes HD Precision Optical Gel Mouse, Silver/Blue (98905) Advanced optical sensor provides precise movement Features a patented soft gel cushion for added comfort Includes 5 programmable buttons; download Fellowes EasyPoint Software from Fellowes.com USB connectivity; Windows 98SE, 2000, ME, XP and Vista 32 bit compatible Compatible as a plug & play device with Windows 7 This items packaging will indicate what is inside and cannot be hidden.