Description: This mouse makes the wrist healthy, the arm position smoother and the overall pressure less due to its scientific ergonomic design. Wireless mouse has automatic sleep function, which has low power consumption and power saving. It is constructed of ABS material. The length of this product is 10.3cm, the width is 5.3cm and the height is 3.5cm. It is suitable for desktops, notebooks, servers, workstations, etc. Item Name: Wireless Mouse Material: ABS DPI: 1200DPI Number of Buttons: 3 Buttons Interface: USB Wireless Transmission Frequency: 2.4GHz Operating Distance: 10m Working Method: Photoelectric 3D Button Operating Force: 170 Plus or Minus 30GF (Vertical Force at the Center of the Mouse Button) Switch Life: 8 Million Times Supported Operating Systems: for Windows9X/2000/NT/2003/for XP/for Vista/7, for Linux, for Mac Battery: 2 x AAA Batteries (Not Included) Application: Desktop, Notebook, Server, Workstation, Etc. Features: Ergonomic, Sports Car Shape, Portable Size Details: 10.3cm x 5.3cm x 3.5cm/4.06" x 2.09" x 1.38"(Approx.) Notes: 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. Package Includes: 1 x Wireless Mouse 1 x USB Receiver