The most accurate refractometer in the world is now even more stylish, smart, and functional, Featuring intuitive touch screen technology, the new RX-i series makes navigation and selection a breeze. The RX-i series come with newly added functions, such as USB flash drive and self-diagnosis capability. This product comes standard with a two (2) year limited warranty against manufacturer’s defects from the date of the original purchase. The warranty period can be extended to three (3) years if the product is registered with ATAGO. FDA 21 CFR Part 11 Software Included in Standard Delivery.