**********PARAMETER --- input voltage range DC 5V-24V, support micro USB 5V power supply; bluetooth version 4.2. *****APPLICATION --- headphone, speaker, home stereo system DIY. *****INPUT METHOD --- 3.5 mm AUX input & 2.54 mm 3P AUX input. *****OUTPUT METHOD --- 3.5 mm audio output & 2.54 mm 3P audio output. *****LED INDICATOR --- indicates status of waiting for a connection/connected/audio playing.