Genuine Dell M534D Silver Premium 6-Button USB 1600 DPI Laser Scroll Mouse, Compatible Dell Part Numbers: K251D, M534D, Y357C, Model Number: M-UAV-DEL8 Genuine Dell 6-Button USB Wired Scroll Wheel Silver Laser Mouse Color : Silver Gray | USB Wired Plug & Play Connectivity | Laser accurate technology Works on virtually any surface | 6-button interface | Scroll wheel for easy web navigation Four resolutions settings for greater precision: 400, 800, 1200, and 1600 DPI Compatible Part Numbers: K251D, M534D, Y357C, 1KHD8, 4K93W, 1KHD8, 3X72X | Model Number: M-UAV-DEL8