Racing Scanner Handheld Nascar Race Indy Sprint Cup Fan Radio One touch MRN (Motor Race Network) key for easy operation Cellular phone function with optional headset and microphone Built-in intercom function with optional headset and microphone lets you talk to a friend while listening Preloaded frequencies for ARCA, IRL, Indy Lights, Nationwide Series, Sprint Cup and more Compatibility: Receives 450-470 MHz frequencies, 6.25 kHz steps, 40-channel scan/second