We have one of those signal booster thingies for the car to tune into digital radio and MP3/iPods. It has a range of about 20ft though why anyone should need to boost a car radio signal 20ft from their car is beyond me, but it does make it fun to pull up in traffic queues and watch everyone else for a 3 car radius wonder why their radios are suddenly broadcasting Adge Cutler and the Wurzels or Meatloaf.