1.Q: Leading time for order? A:1-3 days for sample order, 5-10 days for bulk order 2.Q: Shipment information? A:Sample is shipped by UPS, DHL. Fedex,etc, takes 3-5 days. Bulk order can be shipped by air or by sea. 3.Q: What's your MOQ? A:Without logo: No MOQ limit With logo: 300pcs. 4. Q:For Amazon seller. A:We can ship to amazon warehouse directly, only need offer us Amazon lables, will handle all things. 5. Q:What is your diffuser warranty? A:18 months warranty, longer than most of factories in China 6. Q:What is your defective rate? A:We are offering full inspection, and our defective rate under 0.1% 7.Q: How to do if there is diffuser broken? A:Just send us video or photos, will make replacement in your next shipment. 8.Q: OEM Service A:Customization on diffuser and package box. 9. Q:What kind of Power adapter you can offer? A:UK, Australia, European and American power adapters are available.