Mini adapter plug and play. Wireless transmission, the operation distance up to 10 meters. Power switch for saving power. With 6 keys, including scroll wheel, page forward and page backward buttons for easy Internet surfing. Type: Wireless Mouse DPI: 1200 Power by: 2 x AAA Batteries(Not Included) USB: Ver 1.1/2.0 System Requirement: for Windows 2000/XP/Vista/Linux/Win 7/MAC Operation System Features: Lightweight, 2.4GHz, Matte, Wireless, 6 Keys Dimension: 9.8cm x 5.9cm x 3cm/3.86" x 2.32" x 1.18" (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 Wireless Mouse 1 x USB Receiver(Battery is not included.)