This product features a professionally finished mechanical trackball measuring 36 mm in diameter. The trackball has three mouse buttons on top that can be used to quickly navigate between web pages by left and right clicking. Designed specifically for harsh environmental conditions, the trackball is dust and moisture protected (IP54) and made of resin resistant to mechanical, chemical and physical influences. It has a USB or PS/2 interface. Thanks to the mounting holes, it can be easily mounted to any equipment from the inside, providing a more secure installation. It is compatible with Windows and Linux operating systems.