This product is a high-end model of an index/middle finger-operated trackball mouse. The adoption of a middle-sized ball with a 44 mm diameter enables a wider range of ball operation as well as subtle operation. With a beautiful arched form shaped like the palm of the hand, the product is designed to be inclined at 16 degrees to the setting surface, allowing for a more natural palm resting position. Equipped with wired, wireless, and Bluetooth connections, the product offers various operation settings. The installation of a switch manufactured by OMRON Corporation durable for 10 million clicks, an optical-designed wheel encoder free from wear during motion, and durable parts on the movable area increases the product quality.