DC 3.7-5V Audio Receiver USB SD TF Card MP3 Decoder Board Wireless Audio Player Module FM Radio Module Speaker Power Amplifier

Product Introduction:
1.Power Supply Voltage:DC 3.7-5V
2.Support AUX function
3.Support FM radio function
4.Power output 3W

Notice:
1.2P Socket BAT+ connects with 5V+,BAT- connects with GND;2P socket L-0-/L-0+ connect with loudspeaker 1,2P socket R-0-/R-0+ connect with loudspaeker 2;
FM signal connects with antenna symbol position;IN is for 5V charging port input and external connection voice source input (AUX);you can choose USB and charging wire AM+3.5/mini5pin

2.Operating voltage is lithium 3.7V,or stabilivolt power 4.5-5V,current (if connects with one loudspeaker,600-700mA;
if connects with two,1.3-1.5A.Loudspeaker:4 ohm 3W;
if the current is not enough,then it will appear jumping song or the malfunction of the remote control);
voltage should not be higher than 5V,or it will destroy main chip or power amplifier IC or other relevant components

Function Introduction:
1.Power on/off:
  1)Power on:remove the power switch into "ON" position
  2)Power off:remove the power switch into "OFF" position

2.MP3 Play Operation:
  1)When power on,plug the U-disk or SD card which copied MP3 songs,and the machine will automatically recognize and play
  2)"PREV":short press will play the previous song;long press will decrease the volume
  3)"NEXT":short press will play the next song;long press will increase the volume
  4)"MODE" mode selection:cycle FM,AUX,MP3 by turn
  5)"Play/Pause":short press will jump into next saved radio;long press for 3s will automatically search and store radio AUX function operation
  6)Press the "MODE" key and let the machine switch into "AUX" state,then other modes are invalid;only "MODE" key is valid
  7)Voice source is input by MINI USB,volume is controlled by external connection device
  8)"MP3" state:display current playing song from U-disk or SD card,and display play time progress
  9)Adjusting volume:display volume line
  10)"AUX" state:display current operating state
  11)"FM" state:display current radio frequency