Results will vary greatly from person to person, depending on the type of teeth or conditions of teeth/stains the user has. It may take a number of months to completely rid your teeth of tough stains. We here at NiuSmile are not able to refund purchases unless the product is defective.
NiuSmile will offer a refund, but only within 8 days and only for defective items. This refund is only available if all items provided are returned to their original state, and include all packing material, original manuals and instructions, and any accessories that came with them. Partially returned items will NOT be accepted. Once the LED light and mouth tray has been used, it will not be liable for a refund. It is the customer’s responsibility to pay for shipping costs upon return. Refunds will be limited to the cost of the item being returned via regular post not express. An item returned via express is the responsibility of the user, and a partial refund of only the actual regular mail value will be made. It is the user’s responsibility to be aware of this.
If an item has a defect and needs to be returned, you must first e-mail email@example.com and describe your problem.