This API is available on Firefox or Firefox OS for installed or higher privileged applications.


The setFrequency method is used to change the frequency listened to by the radio.

Each time this method is called successfully, the frequencychange event is fired.

The frequency to set must be in the range defined by the frequencyLowerBound and the frequencyUpperBound properties.

When set, the actual frequency used by the radio is the frequency passed as input but rounded according to the value of the channelWidth property.


var request = instanceOfFMRadio.setFrequency(frequency);


The value of the new frequency to set, It's a number representing a value in MHz (MegaHertz).


It returns a DOMRequest to handle the success or error of the operation.


var request = navigator.mozFMRadio.setFrequency(100.15);
request.onsuccess = function () {
  console.log("The radio is now listening the frequency: " + navigator.mozFMRadio.frequency + "MHz");

request.onerror = function () {
  console.log("Something goes wrong!");


Not part of any specification.

See also

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 Contributors to this page: chrisdavidmills, teoli, kscarfone, Jeremie
 Last updated by: chrisdavidmills,