Free shipping PAM8403 module Super board 2 * 3W Class D digital amplifier board efficient 2.5 to 5V USB power supply<br>Quantity:1pcs<br>Weight:3 g<br>Color: as picture show<br>Size:20mmx20mmx1.5mm/0.79"x0.79"x0.06"(inch) (approx)<br>Features:<br>1.Advanc