Relay output, plug-and-play design. Easy to program and safe to use. This thermostat plug outlet supports temperature display in Celsius or Fahrenheit. Temperature control range: -40~120C / -72~176F. Power supply: 100~250V AC 50/60Hz; Output: Max 16A/230V. Temperature control function with range of -40~120C and control accuracy of 1%. This digital temperature controller plug allows setting of start and stop temperatures for automatic heating or cooling operation. When start temperature is greater than stop temperature, the unit operates in cooling mode; when start temperature is less than stop temperature, it operates in heating mode. Supports temperature calibration for improved accuracy. Timing function with F01F04 modes for cycle timing and countdown: F01 Cycle Timer mode, F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and OFF mode. Select F01 for cyclic operation or F02F04 for timed on/off control. Timing range: 099 hours 59 minutes. Note: This thermostat plug operates in one timing mode at a time. Additional features include a 1.7m NTC 10K temperature sensor probe, large LCD display, temperature calibration, reset function, and data storage to retain settings after power loss. Wide range of applications: Suitable for use in greenhouses, reptile enclosures, incubators, terrariums, freezers, refrigerators, heaters, home brewing systems, vivariums, fermentation setups, heat mats, and other temperature-controlled environments. Can also be used as a timer for cyclic or countdown operations.