All products you buy from us have a legal warranty. This means that a product must be in good condition on delivery and function properly under normal use. You should be able to use a product without problems for a certain period of time. How long a product lasts depends on what product it is. A product is not good if it is incomplete, damaged, broken or not functioning properly.
If a product does not function properly within the applicable warranty period, we will look for an appropriate solution as soon as possible (for example by means of a (free) repair, a new replacement product or crediting the amount paid). If the problem with the product is caused by your own fault, the right to a (free) repair, a new replacement product or credit of the amount paid will lapse. Have you used the product normally but it is just worn out? Even then the right lapses a (free) repair, a new replacement product or credit of the amount paid.
The invoice (or other proof of purchase) of your order is the warranty of your product(s).