USB pencil sharpener: 1:best manual pencil sharpener 2.fully compatible with version 1.1 and 2.0 3.high speed up to 480Mbps USB sharpener: 1.USB 2.0 sharpener for gift.2.Fully compatible with version 1.1 and 2.0.3.High speed up to 480Mbps.4.Support ORS2.0, Window98, ME, Window2000, Window me, XP and Vista5.Hi-Speed downstream ports sufficient for diverse devices6.Quality certified, best service ...