1. Unique Combo: A perfect blend of a vertical mouse and trackball, offering the best of both worlds in terms of comfort and functionality. The trackball allows for accurate and smooth cursor movement, enabling precise navigation and control. | 2. Ergonomic Design: The vertical orientation reduces wrist strain and provides a natural grip, ensuring extended use without discomfort - ideal for large hands. The buttons are not programmable. | 3. Customizable DPI Settings: Featuring 600/800/1200/1600/2400 DPI adjustments to suit various tasks and preferences, ensuring accuracy and speed when needed, this mouse caters to various work and gaming scenarios, offering ultimate precision. | 4. 2.4G Wireless Connection: Experience stable connectivity with the 2.4G wireless technology, eliminating cable clutter and providing a 10-meter effective range, offering greater freedom of movement. | 5. Silent Click and Battery: Featuring a quiet clicking mechanism, making it ideal for use in quiet environments such as libraries, offices or shared spaces. The ball can be removed for easy cleaning, ensuring optimal performance and longevity. It requires only one AA battery for power (no included)