ALLEK 2.4GHz 1600 DPI 6 Keys Wireless Optical Mouse with USB 2.0 Receiver for PC Laptop Precision control with 3 DPI settings:800/1200/1600 cursor speed adjustable The exquisite and smart design,comfortable handle,convenient to carry.Low power consumption.Automatically returns to the sleeping state. The 6 keys wireless mouse measures 3.93" x 2.38" x 1.4".Next/Previous buttons provide convenience while web browsing The advanced 2.4GHz Wireless transmission up to 10 m operating distance.Low voltage alarm function. 2AAA Batteries(NOT Included).Compatible with Windows 98/2000/XP/Win7/Vista/Mac/Linux/OS operation system.No driver needed, plug and play