After-sales service: A: unconditional return or replacement within one month, the delivery fee shall be borne by the Dongguan yangling electronics Co.,LTD. B: Any purchase of any product within a week of quality problems can be replaced by the same products or other products. The delivery fee shall be borne by the Dongguan yangling e-commerce co., LTD. C: No quality goods to replace, return goods. Repair or replace the same goods within 1 week, and all delivery expenses shall be borne by the customer.