A: All goods are tested, and the test report is provided. We have strict QC before shipment and we provide a 90-180 day warranty. 2. Q: Can you send us samples to check? Samples for free? A: We can ship you samples and send you pictures of product details. However you need to pay for the sample fee. 3. Q: What is the MOQ? A: 1 piece. 4. Q: What about payment terms? A: L/C, D/A, D/P or T/T. 5.If you have any other questions, please feel free to contact us.