ADESSO iMouse T50 Wireless Ergonomic Finger Trackball Mouse Nano USB Receiver Programmable 7 Button Design 5 Level DPI Switch For Left and Right Hands

Ergonomic Contour Design - Minimizes pain and discomfort to the forearm muscles that cause carpal tunnel syndrome.Built-in 2" Large Trackball with Optical Sensor - Accurate and precise tracking with fewer muscles for maximum comfort.Easy to install programmable drivers - friendly user interface to change button assignments.Detachable Trackball - Easily detach by pushing the trackball from under the mouse.Adjustable DPI Switch - You can adjust the cursor movement speed from 400-4 800 DPI.Connection technology Wireless USB.Note For wireless mice, a USB receiver is provided inside or with the mouse.