Dell MS300 - Mouse - full size - right and left-handed - optical LED - 3 buttons - wireless - 2.4 GHz - black - retail - box - with 3 years Next Business Day Advanced Exchange Service. Enhance your all-day productivity with this RF 2.4 GHz wireless mouse. With the programmable middle click button, you can gain quick access to your frequently used applications, folders and functions. The Dell full-size wireless mouse is built to last with battery lives at many months. Rest assured that this mouse has been rigorously tested to ensure seamless connection to your Dell PC. Featuring an ambidextrous symmetrical design, this mouse is great for both left and right-handed users.