Comfortable Ergonomic Design Take the strain and discomfort off your wrist and arm with the comfortable ergonomic layout of the mouse. The attached palm rest helps provide a relaxed grip without any discomfort even during extended computing sessions. Side Thumb Scroll Wheel Conveniently placed side thumb scroll wheel allows you to move left/right on the page easily. Perfect for when youre using designing software, or balancing excel spreadsheets. Adjustable Mouse Sensitivity With the ability to choose between 3 adjustable DPI levels (800/1200/1600), set the mouse cursor sensitivity to your needs easily with the press of the DPI button. Wireless 2.4Ghz Connection Providing up to 32ft. working range, simple plug the included USB receiver in to the computer, place the included battery inside the mouse and turn it on, forget about any additional cables or wires, and enjoy convenience without any hassle!