Precise temperature control The fermentation machine uses a temperature control meter with accuracy to 0.1 C. Set PO (start temperature) to 24 C and P1 (stop temperature) to 33.4 C. When the display shows 24 C, the heating indicator is on; when the temperature reaches 33.4 C, the indicator turns off and heating stops. Note: P1 > PO indicates heating mode. thermal insulation inner layer Inner insulation uses aluminum film plus pearl cotton for tight, durable construction. Seams are neatly stitched and designed not to burst the bag. Built for longterm thermal insulation, suitable for both hot and cold use. No peculiar smell The unit operates without emitting odors and does not affect the taste of food during fermentation. It includes a builtin 75 C thermal protection to prevent overheating and enhance safety. Doublesided heating pad construction Front surface is black waterproof fabric, offering dirt resistance. Back surface uses white insulation cotton to reduce heat loss. The heating pad is washable; do not immerse the interface or other components in water. Specifications and features Temperature control range: 24 C to 33.4 C with 0.1 C accuracy. Insulation materials: aluminum film and pearl cotton inner layer; doublesided heating pad with waterproof fabric and insulation cotton. Safety: 75 C thermal protection for improved safety during use. Cleaning: heating pad is washable; avoid submerging electrical interfaces and other parts. Use scenarios Yogurt, kefir, or probiotic beverage fermentation at a stable 24–33.4 C to ensure consistent texture and flavor without temperature fluctuations. Sourdough starter development or other plant or dairybased ferments that benefit from steady warmth and insulation in a home kitchen. Fermentation or aging of smallbatch foods and beverages where precise temperature control and energy efficiency help maintain quality and reduce spoilage. Notes on use Designed for home fermentation tasks in environments where reliable temperature control and insulation are important. Follow typical care instructions for the washable heating pad portion; do not submerge interfaces or electrical connections.