As a rule, this applies to finished products. Proprietary manufacturer's warranty on the goods specified in the receipt issued to you upon purchase (in front of the goods is marked With a/C). Usually included is a warranty card to be used for the purchase of goods. Sometimes the service item is not in the warranty card and serial number. In this case, the warranty card in the package, you will not find, but in the user manual will contain a list of service centers performing warranty service of this product.