With its built-in wrist support and neutral grip, the ergonomist-approved Pro Fit® Ergo Wireless Mouse positions your hand for improved comfort. Features include dual wireless (2.4 GHz and Bluetooth 4.0 LE) with 128-bit AES secure encryption, quiet clicking for quiet office environments, five buttons (including forward and back) to enhance productivity, a three-mode power-saving switch, and three DPI settings (800/1200/1600) for improved cursor sensitivity and precision.