Your trackball stays in one place and puts control under your thumb, so you don't have to move your arm to move your cursor
This trackball includes the Logitech Unifying receiver. The tiny wireless receiver stays in Your laptop, so there's no need to unplug it when you move around
You get precise cursor control wherever you want to use your trackball. Hard Tables, comfy sofas and lumpy beds are all no problem for the M570
The integrated scroll wheel and easy-to-reach back/forward buttons make control simple, whether you're web surfing on a laptop or Navigating a home-theatre PC
Sculpted shape supports your hand for comfortable control all day long. Sensor resolution 540
Note : In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse