This USB presenter is superior is ergonomic design allows user to comfortably take control of the PC and presentation. This presenter supplies presentation and laser pointer functions to make your presentation flow continuously. It is convenient to use in any USB port. This useful USB RF presenter with laser pointer offers great range reliability and freedom of movement. - 2.4GHz frequency RF wireless operation range 10 meters - Built-in 650nm wavelength laser pointer range over 200 meters - Powered by 1*AAA batteries (included) - 1* English manual included - Support system: Windows 98/SE/ME/2000/XP/Linux/vista/Mac OS