1.mp3 board usb sd card 2.FOB price:US $0.95-98.95/pcs ... approved 4.Payment terms:T/T,Paypal mp3 board usb sd card / manufacturerWelcome to Eastwin! Our PCB board manufacture and PCB ... For PCB Number of Layer1,2,4 or 6,upto 18 layerOrder Quantity1 to 50,000Board ShapeRetangular,round,slots,cutouts,complex ...