The warranty on SIGMA products in North America is 2 years from the date of purchase. The warranty covers defects in material and workmanship. The warranty does not cover batteries, wear-and-tear, wear caused by commercial usage, or damage caused by a crash/accident. Proof of purchase is required. If your SIGMA product is not functioning properly and you feel that you have a potential warranty claim, please contact SIGMA USA at 888-744-6277 for technical support and/or to receive a return authorization number.