To ensure their proper functioning and prevent any voiding of the warranty, we recommend that you hire a qualified professional to install your car audio accessories. Our products benefit from the legal guarantee of conformity and the guarantee against hidden defects, in accordance with French laws. These guarantees apply to defects in conformity which appear within two years from delivery of the product. In the event of a lack of conformity, you can choose between repair or replacement of the product, subject to the cost conditions provided for by law. They also cover hidden defects in the product which make it unfit for the use for which it is intended, or which reduce this use so much that you would not have purchased it, or would have given a lower price, if you had known about them. You have two years from the discovery of the defect to take action. In particular, the following are excluded from the guarantee: Damage caused by installation not in accordance with the instructions supplied with the product. Damage due to use not in accordance with the intended use of the product. Damage resulting from modifications or repairs carried out by the customer or an unauthorized third party.