The Logitech Unifying USB Receiver is a sleek black device that allows for wireless connectivity between a mouse and keyboard. With a maximum DPI of 1000 and an ergonomic design, this receiver offers a comfortable and precise tracking experience. The optical tracking method ensures smooth and accurate input, while the scroll wheel and 3 buttons provide added functionality for a seamless user experience. Perfect for those looking to enhance their computing setup with a reliable and efficient wireless solution from a trusted brand like Logitech.