Features (1) ROLE: Temperature controller products are used in solar water heaters, temperature differences and temperature control outputs. It has two output controls and the temperature difference control is stable in two temperature zones. So you can use it with confidence. (2) AUTOMATIC: When the temperature reaches the set value, the temperature controller automatically runs the water pump cycle to balance the temperature in the two temperature zones, which can improve your quality of life. (3) HEATING: Another channel of the temperature controller controls the electric heating.When the solar heating does not reach the set temperature, the electric heating system can start automatically and warm up to the set temperature, which will control the heating system and automatically keep the water temperature to the temperature difference.In the frame. (4) HIGH QUALITY: 100% brand new, quality assurance, high quality. (5) GOOD AFTER SALE SERVICE: Customer service online response, good service attitude, you can contact us at any time if you have any questions, we will be happy to serve you. Package List