Ergonomist-approved design, built-in wrist rest and neutral grip supports, Dual wireless connection, plug & play USB connection, quiet clicking makes for smooth and non-disruptive operation, five buttons (including forward and back), three-mode power-saving switch. Claim a free Leitz Z1000 Air Purifier when you spend over 100 on selected Kensington & Leitz Ergonomic products until 30th September 2023 Terms & Conditions apply, to claim please register online here. The ergonomist-approved Pro Fit Ergo Wireless Mouse positions your hand for improved comfort. 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 encryption security, quiet clicking, five buttons (including forward and back), a replaceable receiver, a three-mode power-saving switch and three DPI settings (800/1200/1600) In the event the receiver is lost