A proven and easy way to remove moisture, dust and small dirt from the speaker of your iPhone or Android smartphone. During the playback of special audio signals of a certain frequency, an intense vibration of the speaker membrane occurs, which allows you to remove, blow out (and in fact throw out) dust, moisture or other contaminants. Using this sound at full volume will help clear the speakers of your smartphone. Frequency Range: 150-200 Hertz, Waveform: Sawtooth
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