The Product Registration Key is your authorisation for anti theft related support, for example retrieving a lost PIN code. Please keep the product registration leaflet in a safe place for future reference. The product registration leaflet must be included with the product if it is sold or passed on to another user. GARDENA guarantees this product’s functionality for a period of two years from date of purchase - not from the date of product registration. Warranty terms are found in the Operator's Manual.