uxcell Portable 800dpi Slim 3D Optical Flat Floral Black Mouse Product Name : USB Optical Mouse;Interface : USB 2.0;Resolution : 800-1200 DPI Button Number : 3;Operated System : Windows 98/Me/2000/XP/Vista Casing Material : Plastic;Color : Black Cable Length : 25";Size : 3 1/4" x 2" x 1/2" (L*W*D) Weight : 34.7g;Package Contain : 1 x USB Optical Mouse