1.All products are strictly inspected before packaging to ensure that the defective rate is less than 1%. 2. If any defects are caused during transportation or improper use,We will send you a substitute in your next order. 3. The buyer is responsible for the shipp cost of the return, and the seller is responsible for the shipp cost of resending the replacement part. 4.We will choose the suitable shipping method according to goods weight and dimension, such as DHL, Fedex, TNT, UPS and so on. 5.Please make sure to provide us with correct, precise, and detailed shipping Address (name, telephone number and address are necessary),or the package will back to me,if so you have to pay me the shipping fee,hope you can understand..syi