Features: For G502 wireless mouse is equipped with switching button and G4/5 side button set replacement Convenient and quick operating, improve the efficiency of work and game. Stable wireless connection, precise sensoring, adjustable DPI, multiple functional button, ergonomic design for long time use. Smooth scroll wheel design for more precise scrolling control; High sensitivity sensoring, adaptable to different usage scenario. providing a smooth operating experience and precise control. Specifications: Item: Mouse Roller Conversion Key and G4/5 Side Key Button For G502 Wireless Mouse Package Size: about 10CM/3.94in Component： Plastic Package Includes: 1Set Mouse Roller Conversion Key and with G4/5 Side Key Button note: Due to the problems of lighting effect there will be certain tolerances in the product, please understand. Please allow 1cm errors due to manual measurement.