We check the products to be defect-free and do a functional test for about an hour before packing the product for delivery. This means that we try our best to ensure good quality products to be delivered to our customers. We are also aware that, sometimes the product might not be what you expected, or might not be functioning well within a short time. We try our best to deliver the best, and in case we fail to do so, the items can be returned within 10-days from the day of purchase. We would also pay the shipping back charges. Please contact our customer care service / raise a ticket in case you face any such issues.