Our working hours China time (8-6)
US time (13-21)
During this period, if you have any pre-sales questions, you can consult me. For inquiries beyond working hours, our reply is not so timely, please don't worry. We will reply to you as soon as we see it.

All our products are guaranteed for 30 days after receipt.
We don't have warranty after 30 days, but you can still contact us and we will try our best to provide you with a solution.
Any after-sales problems, or problems that cannot be installed and used, please contact and send us an email. We will contact you as soon as possible to provide you with solutions.

Please contact us before refunding and we will provide you with a return address.