Ergonomic: The mouse is designed with an arc shape and fashionable appearance, easy and comfortable to hold. Cordless: This kind of mouse works with low power consumption, and it has several low power modes. Operation: The arc wireless mouse is moving with no burr, sensitive and smooth, it gives you a good experience. Portable: This computer mouse is small and folding, easy to store and carry without taking up so much space. Gift: This mouse is suitable for both women and men, it can be sent to your friends as a good present. Specification: Color: show as pictures. Size: approx. 100-120mm or 3.94-4.72inch. RF: 2402mhz-2480mhz. RF operation channel:16, automatic frequency hopping. Rated voltage:1.5V or 3.0V. Rated current:7.5-14 MA. Max. Acceleration:28ft or Sec. USB: over. 1.1 or 2.0. Battery: not included. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Wireless Mouse. 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.