A:Answer I assume by wireless, you mean portable. The unit requires to be plugged in, but you can buy a 3rd party rechargeable battery as an add on. I didn't see it on Best Buy, so I bought Echo at Best Buy, and the battery from a different online seller. With the battery, as long as you are within your Wifi range, it works perfectly. They really should make an upgraded version with this standard. I saw there is one being test marketed in India, but not sure when this will make it here.