1.We're responsible for any failure products caused by us. If the defect ratio is under 2% per order. Just tell us the quantity, we will send you replacements without asking any questions or requiring any pictures, texts etc before we send you replacements.
2.If the defect ratio is over 2% or the problem is serious, just send the defective ones back to us with shipping cost on us. And we will send you free replacements immediately after confirming it. And all cost will be on us.
3.For the first order less than 100 (pcs or kits), if you find it not a salable product within one month and need your money back, though it's not a quality problem, you still have the right to get your money back.
4.Send the goods back and we we will take care of the shipping cost, and send your money back without any reasons.