Specification:Power: 1000 WVoltage: AC220V~240V / 50~60Hz & AC110V~120V/60HzTemperature Min C: Room TemperatureTemperature Max C: 99CTemperature Stability C 0.01CCirculation Pump: 8.4 LPM MaxNote:1.Machine works with some noise,it is normal.2.The temperature detector of the machine is near the heater,so the display temperature will be 2-4 degree Celsius higher than the temperature you ae detecting outside.This is normal range.Not a quality issue,you can use it normally.The principle of low-temperature slow cooker is through the meat,vegetables into the heat-resistant plastic bags, after the vacuum, andthen placed in the low temperature slow cooker machine constanttemperature water bath for a long time cooking.Benefits:1. Reduce the loss of water: vacuum low temperature cooking food, water loss is only between 5% -8%, food is more tender.2. Keep the original flavor of food: in the long cooking process, most of the meat in the flavor material, minerals, flavored amino acids retained in the meat, can reduce the use of seasonings, to retain the nutritional content of food. Origin:CN(Origin) Certification:CE Rated Voltage:AC220V~240V / 50~60Hz & AC110V~120V/60Hz Power:1000W Circulation Pump:8.4 LPM Max Temperature Min:Room Temperature Temperature Max:99C Temperature Stability: 0.01C