I find many write WIFI but they just mean "wirelessly." A few wires are needed from the audio source to the transmitter and from the receiver to the stereo. Keep in mind that audio delays are not uncommon so before you buy, ASK ABOUT THE REFUND POLICY.

And now we can google it.

http://www.google.com/search?hl=en&source=hp&q=Stereo+Wireless+Link

For me, Amazon is where I go (poor brick stores.) http://www.amazon.com/Terk-Technologies-Leapfrog-LF-30S-Distribution/dp/B00009UHXR/ref=pd_sim_dbs_e_8

I have something similar and for STEREO it's ok.
Bob