Your products will be tested carefully before we send them out , then we will send the photo and tracking number of your shipment . So please donot worry about the quality . Except this we offer one year warranty against mechanical failure with the exception of Human Damage . In fact , we recommend you to email us the problems , because many issues can be fixed or adjusted by yourself . 

       1). If product is new when your clients buy from you within 1 month and it's non-artificial damaged . Please care package and send it to us , and we will replace you a new one as soon as we get it. 

We will repair products for you , if it's not new and it's in the one years warranty .

Anyway  , we will always do best for you , and build nice cooperation on business ! We do trust for each other !