Logitech M220 1200DPI 2.4GHz Ergonomic Wireless Mouse 1. The contoured shape and curved soft rubber grip guide either hand to a natural position. 2. The compact, portable size makes the M220 perfect to toss in a bag and go. 3. Quietly click, scroll and move your mouse around all day and night without over-working either hand. 4. Advanced Optical Tracking and high-performance feet pair to give you silent, precise moves on almost any surface. 5. No need to install software, plug and play. For computers with Windows, Mac, Chrome OS or Linux 6. Power by 1 x AA battery(not included) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.