The logitechreg wireless trackball m570 gives you a different kind of comfort this stable trackball stays in one place and its sculpted shape supports your hand to let you work all day with ease instead of chasing a mouse around your desk the tiny logitechreg unifying wireless receiver is small enough to stay in your laptop and you can use your trackball for up to 18 months between battery changes you get precise cursor control wherever you want to use your trackball ndash hard table