1. Quality assurance: The products will be tested on site before sending, and only the products with no problems will be sent to you. 2. After-sales guarantee: new products we provide 6 months warranty, used products we provide 30 days warranty, and 7 days no reason to refund, if the model is wrong, the buyer bears the freight. 3. Service guarantee: You can consult us at any time if you have any needs, we serve you 24 hours with the most sincere heart. 4. If you have received the goods, please feedback to us, so that we can better provide you with after-sales service. 5. Your feedback is very important to us, if you are satisfied with the product, we hope you will leave feedback.