Wireless mouse features an ergonomist-approved design that positions your hand in a comfortable position to minimize strain. Built-in wrist support and neutral grip support, cushion and position your wrist for comfort and neutral hand alignment. Dual wireless design provides the flexibility of 2.4 GHz and Bluetooth 4.0 LE for a reliable connection. Plug-and-play USB connection offers smooth, nondisruptive operation. Five buttons, including forward and back, enhance your navigation and productivity. Three-mode, power-saving switch allows you to toggle between 2.4 GHz, Bluetooth and Off for the best battery life. Three dpi settings let you dial in the sensitivity and precision of your mouse cursor.