The ProtoArc EM05NL Ergonomic Wireless Bluetooth Trackball Mouse is a sleek and ergonomic mouse designed for precise tracking with its optical tracking method. With a maximum DPI of 1600, this mouse offers a smooth and precise cursor movement. Its wireless connectivity via Bluetooth makes it easy to use with a variety of devices. The included charger ensures that the mouse is always ready to use. The trackball design, in conjunction with the ergonomic features, provides a comfortable and efficient user experience.