I don’t understand how this gadget the sony mouse talk and the yappernut gadget dubbed the yeppermouse,gets all the publicity when it only performs on voip and renages the purpose of traveling light so a pc user who happens to travel does not have to carry too many gagdets. Why have two peripherals to deal with when you only need one? Here is a real invention, in 2004 another company invented the Cellmouse and that one works on all cellphones which alot more people have. With the Cellmouse you do not have to have voip service at an aditional charge as well as you do not have to carry two gadgets. Check it out at www.cellmouse.com.