The ProtoArc Wireless Black Trackball Mouse EM01 NL is an ergonomic Bluetooth mouse designed for comfortable and precise tracking. With a maximum DPI of 1600 and optical tracking method, this mouse provides a smooth and accurate cursor movement. The sleek black color and wireless connectivity make it a stylish and convenient choice for users looking for a reliable trackball mouse. The 6 buttons ensure easy navigation and control for everyday computing tasks.