Transmitter Features: Technology: Radio Frequency Frequency: 2.4GHz Light Color: Red Wireless Cursor Control Distance: 50FT Material:Plastic Colour: Black Remote Control Distance: 100-165FT Light Control Distance: Greater than 330ft Max Output: Less than 5mW Working Voltage: 1.5V Sleep Current less than10uA Dimension: 5.3x1.6x0.9 inch Receiver Features: Operation System: XP, Windows 7/8, OS, Linux, USB Version: USB 1.1, compatible with USB2.0, USB 3.0 Working Voltage: 5V DC About this item Mouse Presentation Clicker Clicker for powerpoint presentations combines the function of mouse, with wireless cursor control button and left/ right mouse button, which makes it like a true mouse. With it in your hand, you can be totally free from the constraint of keyboard and make your presentation more efficient Package Contents: 1 x Wireless Presenter If the appearance of the buttons is different, it has no effect on the product Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.