RadioShack Pro-444 Race Scanner Radio Shack 20-444 The PRO-444 Race Scanner lets you listen in on your favorite drivers. Preloaded frequencies for ARCA, IRL, Indy Lights, Nationwide Series, Sprint Cup and more. Dual LCD display lets you view frequencies with ease Built-in intercom function with optional headset/mic lets you talk with a friend while listening Cellular phone function with optional headset/mic One-touch MRN (Motor Race Network) key for one-touch operation