An improved accessory for an electronic device that allows the device to interface with a standard radio receiver or another electronic device using an incompatible digital transmission format. The accessory includes a digital transceiver for establishing digital communications with a first remote device having a digital transceiver. The accessory receives audio data from the device over the digital wireless channel and produces an FM broadcast output signal based upon the received digital audio data. Thus, music from a personal computer or digital music player can be listened to over a standard radio receiver. The accessory can also be configured to produce a Wi-Fi or Bluetooth formatted output such that the audio data can be transmitted to a previously incompatible radio or headphone receiver. The user inputs of the portable electronic device can preferably be used to control functions of the accessory and the device's display to display the selected transmission frequency or channel of the accessory.