Zero Zero commits to provide free warranty service, customers do not need to pay the examination fee, maintenance required fees, artificial replacement parts test fees, or two-way freight if the product is in the warranty period and complies. The warranty period differs with different parts of the product, and details are in the main parts warranty period list. Customers need to pay the cost of maintence for parts that are out of warranty period. The warranty period may vary in different regions of the world, and Zero Zero will adjust the warranty period according to local laws and regulations.