The Evoluent VerticalMouse 4 Small VM4S is a right-handed ergonomic wired USB mouse designed for universal usage with Windows, Mac, and Linux operating systems. It features a 2600 movement resolution, optical tracking method, and 6 pressed buttons. The mouse is made of plastic and has a weight of 6 oz, making it comfortable for long use. With a sleek black, purple, and silver color options, this Evoluent mouse is a stylish and functional choice for those looking for a comfortable and efficient pointing device.