The Kensington Orbit Wireless Trackball with Scroll Ring in Black-Red (K70990WW) is a high-quality trackball mouse that offers a unique and ergonomic design for comfortable use. With a maximum DPI of 1600 and adjustable DPI settings, this trackball provides precise and smooth cursor control. The wireless connectivity options, including Bluetooth and USB, offer flexibility for different devices. Additionally, the programmable buttons, scroll wheel, and on/off switch enhance functionality for a personalized experience. The rechargeable battery ensures long-lasting use without the need for constant charging.