Fits comfortably in a normal-sized hands. However, it is highly recommended due to the spherical shape, to use a Mouesepad with rest. Is also as recommended by Microsoft. Has the usual functions of a mouse. Backspace and Windows button might be better positioned to have to lift your thumb too. The advantage lies in the connection between the PC and mouse on the radio path, instead of Bluetooth, so more stable. On / off switch on the bottom side of the mouse.