|Asymmetrical charge - coupled detection FM stereo AM tuner. Ultra - high performance asymmetrical charge - coupled FM detection circuit for dramatically reduced multipath and noise. 13 FM/AM presets. 3-week memory backup. Preset scan. Auto/Manual tuning. Wide/narrow FM band selection. New AM stereo circuitry. Full 20-15 KHZ frequency/- 70 DB noise in AM stereo tuning mode. AM gain and AM noise elimination circuits.