This is a new use of technology. Have you ever driven by a house and thought, â€œI wonder how much that house is.â€ But you are not interested enough or donâ€™t have time to stop the car, get out and hope there are detailed fliers on the sign post. This real estate agent has placed a radio transmitter in the house that is broadcasting details on this specific AM frequency. All you need to do is tune your radio to hear all about the house. Brilliant!