andmiddot Convenient roller buttons for fast browsing updown leftright and zooming in Microsoftandreg Office and Internet Explorerandregandmiddot Mini storage receiver stores inside the mouse for easy transportation and turns the power off to save battery powerandmiddot LED for power indicator for when batteries are lowandmiddot 2.4GHz mini receiver provides up to 10 metres of reception with no interferenceandmiddot Adjustable dpi resolution allows you to switch between 1600 and 800 dpi