Experience new levels of productivity with the Adesso iMouse M20 2.4 GHz RF Wireless Ergo Mouse. This 2.4 GHz Radio Frequency wireless mouse offers you 30 feet of wireless freedom and eliminates the contraints wired mices often cause. Its optical sensor tracking method lets you work on any surface with better speed and accuracy. In addition, the mouse includes three distinct levels of DPI resolution (500/ 1000/ 1500) for precise targeting (500 DPI), quick response (1000 DPI) or fast maneuvers (1500 DPI). Easily switch between these DPI resolutions with the DPI Switch button located on the top of mouse. All these features, along with its ergonomic design,provide great control,response and comfort with minimal handmovement.2.4 GHz Radio Frequency Wireless TechnologyWith 2.4 GHz RF wireless technology you can enjoy working at any angle and at a distance of up to 30 feet.Ergonomic DesignThe iMouse M20 ergonomicdesignprovides a comfortable grip and eliminates hand strain, while giving great cursor control.Adjustable DPI SwitchQuickly and easily adjust DPI resolution (500/ 1000/ 1500) for a fasterresponse with the convenientDPI Switch located atthe top of your mouse.Battery-SavingUse the battery-saving on/off power switch on mouse base to extend battery life and reduce the need to change batteries.Internet Navigational ButtonsTwo Internet navigational buttons, back and forward, are conveniently located on the left side of mouse to provide you with Internet browser control with minimal hand movement.