The return policy include below two different situation:

1, The problem casued by us ,we accept you return the products , we will undertake the shipping and then make new one send you . or we remake the order and send you ,and you don't have to return them back

2,The problem isn't caused by us ,we will neither accept you return the products nor remake.

The refund policy

As they are OEM products , we don't accept refund in any time.