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TRE – Adjustment of the high frequencies via buttons < > 7. BAL – Adjustment of the left/right volume via buttons < > 7. FAD – Adjustment of the front/rear volume via buttons < > 7. 3 FM•T button ( Frequency Modulation) FM button This button is used for shifting between the different individual FM storage levels and T (Travelstore). 4 M•L button ( Medium wave - Long wave) Use this button to select either the medium wave (MW) or long wave (LW) frequencies. Press button again to shift between MW a