Kensington Wireless Presenter (K33373US) Compact wireless presenter with an ergonomic design and easy fingertip control 2.4GHz wireless technology delivers interference-free control of your pointer from up to 60 feet away Wireless USB receiver fits inside controller's storage space so it never gets lost Intuitive four-button design with one-touch start functionality Compatible with Windows 10, 8.1, 8, 7, Mac OS X