3. Requirements: The voltage of the heating or cooling equipment is 110-220V (AC), and the power is less than 1500W. It is recommended that the power of the equipment be below 800W for long-term work. 2. Easy to install How to use: press the up button to display the starting temperature: long press the up button to display the temperature flashing, press the up or down button to set the starting temperature value, press the down button to display the stop temperature 1. Features: temperature measurement and display; cooling and heating control temperature setting upper and lower limits are easy to operate, suitable for seafood machines. 4. Suitable for temperature control of incubation and breeding, greenhouse temperature control, distribution box temperature control, refrigerator freezer temperature control 5. Power 1500W, voltage requirement AC110-220V, maximum output current 10A