Regular Belkin FM Transmitters can only send signals up to 30 feet, and
for minimum interference and strongest signal, it is only usable within
a distance of 10 feet or less. This modified Belkin TuneCast II F8V2080
FM transmitter, however, can send clear signal to 300 feet or more! You
can easily put this Transmitter at basement, and then receive your
broadcasting MD/CD/MP3 music (or any other audio source) with any FM
radio from any corner of your 2-3 story large house, or even outside of
it.

eBay Item#5757680507