Yes,we have user manual in the product packages.

We do not provide free sample.

We have QC and IQC department to test for income raw materials and the finish products to control all of the procedure, and ensure 100% aging until the quality is meeting the requirement

For brand products warranty is 3 years,for OEM order is 1 year.

We accept payment by T/T,Paypal,West Union,L/C etc.

Depends on order condition,usually 7 working days after payment received.