What's about After sales guarantee?

What's about After sales guarantee?

What's about After sales guarantee?
All be tested before delivery by our professional QC team.
Anti-static bags/bubble bag + foam box + outer cartons 。
    
Most products offer 3-6 month warranty .
but it depends on the merchandise in question (please read specific note on the PI).

All returned parts are requested to be packaged as originally delivered, and original labels marked by us must not be removed,
nor can any of the parts have been used or damaged deliberately.

you should return back all the defective items , we will replace with new items,
but we will not cover the shipping cost .