Front Panel LayoutUBLMODESEL~ISCAN/APSPRV-1750Bluetooth•Power On/Offbutton.Short push for the first time to turn the unit on.With unit powered on, short push for MUTE feature.Press and hold for more than 2 seconds to turn the unit off.Mode Function.Switches amongst Radio, BT AUDIO, USB and Auxiliary mode.SEL stands for SELECT.In Radio mode,t~isworks Band Function.In MP3 playing mode, it works Play/Pause function.In any mode, press and hold it to enter into CLOCK function.In Radio mode, it works Auto Preset and Presets Scan function.In USB mode, it works Search function.3