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