Use RF 2.4GHz wireless technology, it supports an operation range of 50m, allowing you to move around and interact with your audience. Supports USB 3.0/2.0/1.1. Powered by 1 x AAAA battery, not included. Suitable for conference, classes, presentation and so on. Made with premium material, durable to use. Compatible with Windows XP/Win 7/Win 8/Win 10/IOS/Android operating systems.