Adesso iMouse T40 – Wireless Programmable Ergonomic Trackball Mouse – Optical – Wireless – Radio Frequency – 2.40 GHz – Black – USB – 4800 dpi – Trackball, Scroll Wheel – 7 Button(s) – Symmetrical – 2 x AAA Battery Supported

Adjustable DPI Switch – Adjustable cursor moving speed from 400 to 4800 DPI.

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