Kt4000 EU/US Plug Digital Thermostat Temperature Controller for Aquarium Thermostat with Waterproof Sensor Export EU Type Overview Heating and Cooling Relay Outputs. Two temperature set points. Easy to use. Plug and play design. Read in degrees Celsius (C). Compressor delay protection function (0-10 minutes, default: 0 minutes) Temperature calibration function (-10~10C, default: 0C) Alarm when the temperature exceeds the temperature limit or sensor error All parameters can be saved after setting. Refrigeration control output delay Temperature protection can be used in temperature control systems such as aquariums, pet breeding, household freezers, insulated boxes, barbecue grills, water tanks, refrigerators, industrial chillers, steamers, and industrial equipment. Specifications Power supply: 220Vac15%, 50/60hz Temperature control range: -40~99C, default: 20C Resolution: 0.1C, adjustment step: 0.1C Accuracy: +/-1C Heating difference: 1~25C, default: 3C Cooling difference: 1~25C, default: 3C Sensor input: NTC waterproof sensor 3m/9.84ft Relay contact capacity: hot and cold 10A Power consumption: 3W Code function setting range Default LS1 temperature setting value -40~LS2C2CHd Heating difference Value 1~25C3CLS2 Temperature set point LS1~99.9C20CCd Refrigeration difference 1~25C3CPL Compressor delay 0~10 minutes 0AH High temperature alarm LS2~99C99CAL Low temperature Alarm-40~LS1C-40CCA Temperature calibration-10~10C0C Reset: Long press Up and Down Button 3 seconds Package Contents: 1 x Temperature Controller 1 x Waterproof Sensor EU Type