Features: H/C 2 modes design, automatic conversion of refrigeration and heating mode. ABS fire retardant outer, with highly flame retardant, safe and reliable. Control mode of return difference. The temperature display resolution 0.1. Multiple alarm mode selection. Support temperature correction and support for power loss (the parameters of the sudden power failure are still valid. Application range is like home temperature control, farm, various cold storage, greenhouse, aquarium, etc. With ℃ and ℉convert function, you can adjust it according to your habit. Instruction: Normal mode: The red digital tube on the left shows the real-time temperature, the blue digital tube on the right shows the set temperature. Setting mode: The red digital tube on the left displays the setting mode, the blue digital tube on the right displays the setting contents.