Fellowes HD Precision Cordless Optical Gel Mouse  (98904) Advanced cordless technology for clear reception up to 6 feet Features a patented soft gel cushion for added comfort Includes 5 programmable buttons USB connectivity, includes 2 AA batteries Windows 98SE, 2000, ME, XP and Vista 32 bit compatible; compatible as a plug & play device with Windows 7 (no software available) This items packaging will indicate what is inside and cannot be hidden.