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: the display LCD 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). Intelligent time control: this socket The socket thermostat 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.