Plug and Play, easy to install. Wireless, With trackball, cool. Press then apper laser pointer for presentation * Off table and without limitation of operational space. Scrolling function can be controlled simply by your thumb. USB 2.0 interface, plug and play, no software required * Ideal for both laptops and desktops. Place end of index or middle finger on trigger button & thumb on roller ball * Package: 1 x Wireless Finger HandHeld USB Trackball Mouse with Laser Pointer, 1 x USB Receiver, 1 x USB Charging Cable, 1 x Bag