• chip: TPA3116D2
  • power supply 5-24V

top

  • left - volume control
  • middle - 3P audio AUX input
  • right - jack audio AUX input

bottom

  • left - Left channel output
  • middle - power supply, right
  • right channel output

ref

  • legacy wiki page - https://w.electrodragon.com/w/Category:Audio_Amp

  • AMP1003