Q:How to guarantee the quality of products? A:We'll sign quality contract Q:Can you deliver the goods on time? A:If the goods are not delivered within one week, we will refund 1% of the value of the goods and $50 wearing parts. If the goods are not delivered within three weeks, we will refund 3% of the value of the goods and $100 wearing parts. After a month, we will refund 5% of the value of the goods and $200 for wearing parts. Refund will be removed in the next purchase of the corresponding amount and the accessories presented. Q:How about dislike the color? A:We can customize the color free of charge according to customers' preference Q:How about if something goes wrong during use? A:We will help to solve the problem. If the parts are damaged during the warranty period, we will send them for free. Q:Whether can sign nondisclosure agreement A:Yes, we can Q:If you can't use it, how to solve? A:We will send you video explanation for free. Q:Whether can sign international trade legal contract A:Yes, we can