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2 Press SOURCE repeatedly to select the AUDIO IN source. 3 Play audio on the external device (refer to its user manual). EN Set sleep timer 1 Turn on the product. 2 Press SLEEP repeatedly to select a period (in minutes). »»The product switches to standby mode automatically after the preset period. To deactivate the sleep timer: • Press SLEEP repeatedly until [OFF] (off) appears. Note ••The sleep timer setting will be canceled if AC power is disconnected. Listen through a headphone Plug a headpho