SHOP WARRANTY POLICY1. Any man-made damage/man-made problems during the warranty period will void the warranty.2. If during the exchange, the seller will check the item that the buyer wants to replace. If it can be used, the seller will have the right to refuse to do the exchange (unless the buyer can prove that the product cannot be used, excluding operational problems).3. Each product is recorded, if the returned product is not the seller's product, the seller will refuse (replace/return).