Please let us know immediately if any quality issues about the merchandise(Normally this is not happen yet) . Email us(Grace Fan-sales manager) at info@xm-hanlong.com or grace@xm-sintop.com Or contact us direct line 0086-592-383-2652 MOBILE:0086-134-592-77642 . We are responsible to replace after understand the quality issues. We are 24hours ,7 days works for you.