Revolutionary V-mouse will change the way you use your computer, will help you to avoid shoulder or wrist pain. For more details please check WWW. konsult. Pl / en / VM-223 Main function: 2, 4GHz RF technology, multi-channel Presenter function-pageg up and page down Build-in 650nm red laser pointer Optical resolution 1000dpi Scrolling function-simulated 3rd button Comfortable work on soft surfaces Ergonomical shape design Transmission distance-up to 10m Optical light source-blue LED Receiver mini dongle style USB