... SGS,ISO9001,UL,ISO.14001,ROHSDelivery time:sample 3-5days,mass production:5-8days;Package details: ... inside,cartoon,ties outside strengthening;single side pcb board for kdpcb:1--never a production technology ... such as power bank,power charger,and game board,others diy simple electronics,besides hdi and ... supply the lower quality with too cheap price single side circuit board,kdpcb FR4 material all is ...