about this item: Smart temperature controller: temperature range: -40?-120?, temperature control accuracy: 1%. The temperature controller socket can automatically switch between heating and cooling modes, and control heating / cooling during work by setting the start and stop temperature equipment. Various Functions: LCD screen can display temperature control mode and 4 timing modes F01-F04. And with temperature correction function, screen lock protection, storage function (all current settings are saved after power off). Contr? Smart Time: This socket thermostat socket can sense temperature, set on and off temperature, and has the functions of cycle time control, on timing, off timing and timing switching. Time range: range: 0-99 hours and 59 minutes, time accuracy: up to 10 minutes. Maximum load: 16A (2), 3680W. Temperature probe 1.8m: The socket thermostat socket comes with a cable temperature probe of 1. 8 m for connection to the measuring point, with a temperature detection range of -40? ~ +120?. Multiple uses: The digital temperature controller socket can intelligently control temperature and time. It is widely used in household wall heating and other places of greenhouses, aquariums, carbon crystal heaters, thermostat switches, portable air conditioners and aquaculture intelligent control. Product Specification: 1. rated voltage: 230VAC 50HZ. 2. Rated load: MAX 16A 3680W. 3. Temperature range: -40~120. 4. Temperature control error: 1%. 5. Temperature display resolution: 0.1. 6. Timing error: MAX 10 minutes. F01: Cycle timing mode Press "MODE" key to switch to F01. Press the "SET" button to set the ON value (start hour/minute) and OFF value (stop hour/minute). The ON value is the system working time and the OFF value is the system stopping time. This mode is cycle time, which can control the system to work intermittently. F02: Timing mode enabled: Press the "MODE" key to switch to F02. Press the "SET" button and set the hours / minutes. In this mode, the system is controlled to operate at the specified time. For example, if CD ON is set to 30 minutes, the countdown starts and the system starts automatically after 30 minutes. F03: Timing Mode: Press the "MODE" key to switch to F03. Press the "SET" button and set the hours / minutes. In this mode, the system is controlled to stop at the specified time. For example, if you set CD OFF to 30 minutes, the countdown will start and the system will automatically shut down after 30 minutes. F04: CD off/on mode timer: Press the "MODE" key to switch to F04. Press the "SET" button and set the CD ON value (hour / minute) and CD OFF value (hour / minute). In this mode, the system is controlled to start and stop at the set time. For example, if you set CD ON to 30 minutes and CD OFF to 40 minutes, the system will start working after 30 minutes, and when the system starts working, it will stop working after 40 minutes.