Mini Optical Bluetooth Computer Mouse (Black) with Cordless Design- Works with Dell Inspiron i15R , Precision M , Latitude Series Laptops & More Bluetooth Enabled Laptops - Includes 4-In-1 Card Reader! This wireless mouse is compact , portable , and convenient for every day Desktop Computer , Laptop , Netbook , & Ultrabook and Gaming use. Wireless Bluetooth signal works up to 30 ft away 800 DPI optical laser for smooth, precision movement 250% more accurate than standard optical mice Battery conservation mode with low battery LED indicator