How do you facotyr control quality ?

QC /QA/QC 3 time check before package ,suporvisory control on materials arrive  

what is the leading time and shipping way 

1 Sample within 1-2days  ,Wholesales Orders: 3-7days according various quantities 

2 OEM 7-10 days after receiving your sample confirmation and payment

3 shipped via DHL, EMS, UPS, HKEMS, TNT  as per customer's requirements

4 In order to ensure you receive your order tax free upon import,we declare lower value

what is about the quality gurrantee and how is about the return 

1. battery one year , atomizer 6 month or 3 months depend on atomizer type

2.if product defective within warranty time ,you ship back ,new good onwe wil be send in our agreed time . 

3.defective on arrived , take picure or video show reason , free product will send at yourneeded time.