The Logitech M570 Wireless Trackball Mouse is a comfortable and ergonomic option for those who prefer a trackball over a traditional mouse. With a sleek gray design and a laser tracking method, this mouse offers precision and control. The right-handed orientation and included scroll wheel make it a practical choice for everyday use. Overall, the Logitech M570 is a reliable and efficient pointing device for computers and other electronic devices. NO DONGLE.