We guarantee your satisfaction on every product we sell with a full purchase price refund.  We want you to be satisfied with your purchase. However, if you need help or need to return an item, we are here to assist you!  Please Email us with any questions or concerns you may have (email: packir@163.com).  If an item you have purchased from us is not working or preforming as expected, please contact our sales staff for assistance, they can assist in resolving  your problem or even exchange the item for a product that better suits your needs.