What is Warranty years?

A warranty is the maker's promise to repair or replace a fault for a stated number of years from delivery, free of charge for the buyer. Longer is better, though a longer term that applies only to select parts is worth less than it looks. 8BitDo and AGM Mobile both sit at 1 year and 1 year, the same term across their ranges. ACMER is listed as 1 to 2 years, so coverage depends on which machine you buy, and the shorter term is what you plan around. Ahifi CZ/SK/HU and AKASO are the stronger picks on paper at 2 years and 2 years, though check what the terms exclude.