Wireless Technology - Works up to 30 feet of wireless distance. Operates on 12 different channels, each with 65,536 different IDs. Ergonomic Contour Design - Minimizes forearm muscles from twisting and pains from Carpal Tunnel Syndrome. Built-in 1.25Large Trackball with Optical Sensor - Tracks accurately and precisely with less muscle movement for maximum comfort. Programmable Driver - Easy-to-use user interface allows for full customization within seconds. Removable Trackball - Allows for Easy Cleaning. Adjustable DPI Switch - Adjustable cursor moving speed from 400 to 4800 DPI. Back/Forward Buttons - Provides extra convenience for web surfing. Micro-switch - Equipped with its 10 million times lifecycle microswitch, the iMouse T30 provides durability and reliability for your needs. Power On/Off Switch - Maximizes your battery life up to 6 months. Nano Receiver - Tiny and convenient to plug into to your laptop or tablet. Meet one of the newest models of the Adesso Trackball product l