Wireless Presenter, Presenter Pointer, Hyperlink, Volume Control, USB Presentation Clicker for PowerPoint Demonstration Simple one-touch buttons to control your slideshow. Buttons: page up, page down, slideshow start, black screen. Ideal for lecturers, meeting presenters, teachers, sales managers, or anyone giving a PowerPoint presentation. Pages can be turned freely and silently, and highlight effects can be achieved in their presentations. Make your demo or presentation more dynamic. No hassle to set up, just plug the USB receiver into your computer. No driver required. Lightweight and compact, fits in your pocket or handbag. Supports MS Word, Excel, PowerPoint, ACD View, website, etc. With page up and down, black screen, and fly/resume functions. Note: Data are all manual measurements, please allow 1-3cm error, due to the light and screen difference, there will be some color difference, subject to the physical object received.