Features: 2.4GHz wireless connection, up to 20m operation distance. Ergonomic design: Fits comfortably on your hand, allowing you to control presentations with ease. Compact and light, extremely simple and natural to use. USB receiver, plug and play, no need to install the driver. Portable and space-saving: Skillfully combines transmitter and USB receiver in the small-size one-piece laser pen. Available for Windows, Linux, Android, Mac OS system.