LEIYANG Professional LED Optical Adjustable 2400 DPI Backlit 2.4Ghz Wireless Gaming Mouse Cordless Mice Mouse type: Wireless Optical Mouse Modern and ergonomically design for easy and comfortable holding No additional software of firmware is required. Simply 'plug and play'. There are 4 levels of DPI, 800 / 1200 / 1600 / 2400 Buttons: 6 buttons with scroll wheel (The left key,The right key, ,DPI Control,Scroll Wheel,Page Forward and Page Backward buttons)