Detect the room temperature in real time, compare it with the set temperature and adjust it automatically, so as to maintain the indoor constant temperature.Functions and features1. 4-digit nixie tube display.2. Accurately display the room temperature and set temperature.3. The appearance design is luxurious, beautiful, intuitive and easy to understand.4. Four wind speed mode settings, low, medium, high and automatic temperature regulation.5. There are two modes in winter and summer (refrigeration and heating).Technical parameters:1. Working voltage: + 9V + 15V2. Self power consumption: 1.0W3. Temperature measurement accuracy: 1 4. Temperature control range: 16.0 ~ 32.0 5. Overall dimension: 85mm 85 30 mm (length) wide High)6. RS485 communication interface Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.