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 play a PowerPoint slideshow. The laser-free design is an ideal solution for locations where laser devices are not permitted. Roam the room with ease during your presentation. Plug-and-play 2. 4GHz wireless connection with 65-foot range delivers secure, reliable performance through a compact USB receiver. No driver required. AES 128-bit encryption, a secure wireless technology adopted by the U. S. government as the encryption standard, protects sensitive data from potential hackers. Battery compartment also provides a handy internal storage space for the wireless USB nano receiver when not in use. Each receiver and presenter are uniquely paired to prevent interference.