If you want full freedom of movement, you should opt for a wireless mouse such as this one. This is a slightly more advanced mouse with as many as six buttons.
From OnBuy
perixx PERIMICE-719 Right-Handed Wireless Mini Vertical Mouse, 3 Level DPI
Conrad Electronic
Perixx Perimice-719 Ergonomic mouse Radio Optical Black 6 Buttons 1600 dpi Ergonomic