Discover the ultimate sourdough starter warmer with a glass dome. This innovative product features a precise 1°F temperature control, allowing you to set the temperature from 70 to 100°F via a simple dial. The thick glass dome, made of shatter - resistant material, locks in heat for better and faster yeast fermentation. It can accommodate yeast jars up to 4.72 in. in length and 7.6in in height, fitting 24 oz., 34 oz., 40oz. jars and most market - available fermentation jars. With a 0 - 12H timer auto on/off function and only 10W of power, it warms up quickly and is energy - saving. The compact heating mat is easy to store and maintain. Although there may be a 3 - 5° temperature error due to outdoor conditions, a pre - use temperature check ensures perfect fermentation. This set, including a warmer mat, glass dome, and user manual, is an ideal gift for bakers and baking lovers, making sourdough baking at home a breeze.