This mouse replaces my "Aged" MS IntelliExplorer two.0 mouse of twelve+ years. It's mainly precisely the same feature set as my old mouse with and has a small "plug and ignore" usb adapter vs the old MS mouses adapter that was exactly the same measurement since the mouse! Electricity usage/Battery: http://trackballmouse20741.blog-gold.com/1059937/wireless-mouse-logitech-for-dummies