1.Doublesided material of the heating pad: The black, waterproof fabric on the front is dirtrepellent and comfortable to wear. The white insulating wadding on the back reduces heat loss. The electric heating pad is washable, but the interface and other parts must not come into with water. 2.Precise temperature control up to 0.1°C(start temperature) is set to 24°C, P1 (stop temperature) is set to 33.4°C. At 24°C, the indicator light will light up for normal heating operation. At 33.4°C, the indicator light goes out and the heating mode is interrupted. P1>P0 Heating Mode 3.Excellent heat insulation inside: aluminium foil pearl cotton, dense and firm, neatly sewn, does not tear, careful workmanship, longterm heat insulation, warm and cold. 4.Odour heating pad: It does not affect the taste of food during fermentation. The builtin 75°C heat protection prevents the heating pad from overheating due to excessive heat, thus increasing product .