Material and build - 304 food-grade stainless steel inner tank with a thickened transparent PP insulation cover. Includes a two-layer proofing rack for versatile use and reliable durability. Temperature control and timing - Precise temperature control from 30 to 65 C and support for up to 24 hours of timing. Set the required temperature and time and let it run without constant monitoring. Spacious capacity - 5-liter dough proofing box with an inner pot diameter of 29.5 cm and a height of 12 cm. Suitable for large batches of dough fermentation or keeping warm to meet family needs. Easy visibility - Transparent sealing cover and observation window allow you to monitor fermentation progress from all angles without opening. 2-3 practical use scenarios - Overnight sourdough fermentation at a controlled temperature to develop flavor and texture with minimal attention. - Large-batch dough proofing for weekend baking or family gatherings, letting you prepare multiple loaves at once. - Keeping dough warm before baking or fermenting other ingredients that require steady low-temperature conditions.