The Elecom Deft USB Ergonomic Optical Trackball is a mouse with a unique trackball design and 8 buttons, including a scroll wheel for precise scrolling. It offers a comfortable ergonomic design and can track with an optical method with a maximum DPI of 1500. The sleek black color, compact size (4.9 x 3.7 x 1.9 inches), and wired USB connectivity make it a versatile and efficient pointing device suitable for various computer setups. Made by the brand ELECOM in Japan, this trackball mouse is a reliable and user-friendly option for those looking for a different kind of mouse for their computing needs.