A: 1 year

A: Refuse to return and exchange goods without reason

A: 

1) Within the warranty: the cost caused by man-made damage is borne by the buyer, and the non-human damage is borne by us.
2) Outside the warranty: the maintenance fee is borne by the buyer

A: The shipping cost of repaired goods is borne by the buyer, and after repairing, the shipping cost will be borne by us.