how do wireless speakers work ? How expensive are they
I thought the "rock" speakers advertised on tv were wireless.
No the rock speakers are not wireless unfortunately. There are two different kind of "wireless speakers." The first kind is not really wireless, but helps get rid of some of the wires and how it does this is there is a wireless transmitter and receiver offered by Rocketfish (Brand name) for either $100 or $105. You will need a receiver (yamaha, onkyo, denon, pioneer, etc.) where you will hook up a transmitter to two speaker terminals and that will send a signal to the Rocketfish receiver which will have two speaker wires going to those two speakers and the receiver portion will power those. Now there are some wireless speakers also offered through rocketfish, but there is a catch to these. You have to use a ton of batteries and it will only work for (if I remember right) 10 hours, but you get rid of the cords and if you have rechargeable batteries maybe this will be the right way to go for you. My personal opinion about wireless speakers is that it is more hassle than what its worth since there are very few options to the quality of speakers you can get and they often cut out due to phone calls, taxi/cop radios, and other frequencies can interfere with that signal. If you really want speakers in your backyard (I'm assuming since you were looking at either the insignia rock speakers or the speakercraft rock speakers that you don't plan on putting them in your living room...unless you like the primitive look jk) then you should run speaker wire to them just for ease and quality purposes. If you don't feel comfortable doing that I'm sure there is a Geek Squad Service that would do that for you.