Features Solar Water Heater Thermostat: The products are used in solar water heater, the temperature difference and temperature to control the output 2 Output Control: Temperature Controller is provided with two output control, temperature difference control two temperature zone Intelligent: When the temperature reaches the set value, it automatically runs the water pump circulation and makes the two temperature zone temperature equilibrium Practical Tool: The other channel controls electric heating, when the solar heating failed to reach the set temperature, the electric heating system can automatically start and heat to the set temperature Heating Control Range: 2℃~99℃, It will control heating system and automatically makes water temperature stay in temperature deference range Specifications: Working Voltage: AC220V ±10%(50Hz/60Hz) Output Load: 5A/220V/AC Power Consumption: ≤3W Heating Control Range: 2℃~99℃ Temp. Difference Start Control: 3℃~50℃ Resolution: 1℃ Precision: ±1℃ Input Signal: 2-channel sensor, 20KX1.5MX2 Size: 76*76*35mm/2.99*2.99*1.37in Operating Temperature: -10℃~50℃ Operating Humidity: RH≤90% LightFunctionSetting RangeDefaultUnit#1temperature difference startstop pump temperature difference +1~505℃#1, #2stop pump temperature difference1~temperature difference start-12℃#2temperature return difference1~205℃#3high temperature correction-10~100℃#4low temperature correction-10~100℃ Package Includes: 1 x Temperature Controller 2 x Sensor Probes Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List