Trust TK-4300p W/less PresenterMouse (14832) The ultimate 6-button 2.4 GHz wireless controller: presenter, trackball, laser pointer and desktop mouse in one device Built-in sensor: automatically switches to presenter mode when picked up, lets you fully concentrate on your work Ideal for controlling presentations, browsing the internet and playing your movies/music with a wireless freedom of up to 15 meters In mouse mode the trackball works as a scroll wheel Use the desktop cradle to charge the presenter mouse via USB in your home/office