I highly recommend going to a music store to buy a microphone to use. Radio shack mics won't sound very good. For around $100 you should be able to buy a great sounding mic that will last alot longer. Another suggestion I have is to buy a steel bowl, you would normally use as a salad bowl. Cut a hole in the bottom,center the diameter of the mic head. Just put the mic head in there and point it at the actors, should sound great. When your done it should look and sound like the long range mics private investigaters use (in the movies)