After becoming our member, you can get our lifetime after-sales guarantee, (all products design by our brand) , The damaged shell can be replaced once for free. The other products of our brand that you buy also enjoy after-sales service! We will provide our members with more after-sales service guarantee in the future!！Also We will provid discount coupons for new product while we design new in the future! Our members will have the opportunity to get free new product testing opportunities!