I bought because of their small size for my Surface Pro 3, the mouse and am very satisfied. It is not as good in the hand but that I did not expect in size. Nevertheless, I am very pleased, as I shuffle along on the tablet quite a lot of music and with the mouse, it has to be agreed no problem smaller knob accurately. In addition, this fits easily due to their small size in the ordered from me case for the Pro 3. Mouse turns itself off to also conserve battery and when they need it is ready for immediate use.