The Logitech M570 Wireless Optical Trackball Mouse is a sleek and ergonomic device designed for comfortable use. Its trackball feature allows for precise control with a maximum DPI of 1000, while the 5 buttons and scroll wheel offer convenient functionality. With wireless connectivity and an optical tracking method, this mouse is both stylish and efficient for everyday use. The black and blue color options add a touch of personalization to the modern design of the Logitech M570. Dongle is in there!