If you want to increase or decrease the frequency for this there are also special buttons that are close and look generally like a triangular parenthesis are directed respectively up and down (possible different variations, depending on the radio).

Often has an option to automatically search for radio stations. To enable the automatic search for a radio tap and hold on it before filing a characteristic of the audio signal. Upon detection of a stable signal for high-quality playback auto search will stop on their own. If you will be forced to suspend the search, press this button 1 time.
In radio there are buttons that enable you to program and switch the radio station. Most frequently listen to radio stations you can store radio. To find and switch them, you need to click on the device settings one of the buttons that are numbered.

Catch the desired radio station using the buttons that increment or decrement the frequency. Next, press and hold the preset button until a beep sounds.
In order to stop the playback of radio stations, click on the button labeled Power (usually it is round size).

Listening to music, adjust the RF signal until, until you are happy with the quality.