The Lenovo 4Y50R20863 Essential USB Mouse in black is a standard mouse with optical tracking method, featuring a scroll wheel, ergonomic design, and adjustable DPI up to 1600. With a compact size of 2.45in in length and 1.34in in height, this mouse is equipped with 3 buttons and a comfortable grip for efficient use. Made by Lenovo, a trusted brand in the industry, this wired USB mouse is a reliable and stylish choice for computer users seeking a high-quality pointing device.