Intuitive four-button layout lets you easily go forward and back on your PowerPoint or Keynote slides, while the other two buttons let you hide your screen and use the red laser pointer. Plug-and-play 2.4GHz wireless connection with 65-foot range delivers secure and reliable performance through a compact USB receiver. 2 AAA batteries. Compatible with Windows 7, 8.1, 10 and Mac OS X, Chrome OS. 3-year warranty.