Specifications: Mini USB mouse, with comfortable ergonomic holding shape. 1600DPI optical resolution, accurate positioning. 3 key mouse with telescopic wire, compact and portable. Plug and play USB interface, suitable for most laptop and computer. Type: Mini USB Mouse Material: ABS Key Numbers: 3 Keys Mouse Type: Wired Mouse DPI: 1600DPI Key Life: 1 million Times Interface: USB Interface Operation Systems: for Win 98/7/2000/ME/XP/Vista Features: Universal, Telescopic, Mini Size, 3 Keys, Optical Mouse Size: 76mm x 40mm x 24mm/2.99inch; x 1.57inch; x 0.94inch; (Approx.) Notes: Due to the light and screen setting difference, the item 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x USB Mouse