Features: This powerpoint presenter allows you to control slides from up to 20meters away. 2.4GHz radio frequency technology, stable transmission With the functions of page up, page down, full-screen, switch window, and hyperlinks. The 656ft long range red pointer makes people easy to find the key- point. With the USB receiver, you have no need to download software. Package Includes: 1PC Presentation Clicker Specifications: Name: Presentation Clicker Material: ABS Colour: Black Power supply: 2xAAA batteries (not included) Size:approx 116x37x28mm/4.57x1.46x1.1in note: Due to the different monitor and light effects, the actual color of the item might be slightly different from the color which is showed in the pictures. Please forgive slight measuring deviation due to manual measurement.