warranty
noun [ C ] uk/ˈwɒr.ən.ti/ us/ˈwɔːr.ən.t̬i/
（商品的）保修单，保修卡
a written promise from a company to repair or replace a product that develops a fault within a particular period of time, or to do a piece of work again if it is not satisfactory
The warranty covers the car mechanically for a year, with unlimited mileage. 保修单承诺对汽车的机械部件保修一年，不限里程。
Synonym: guarantee