Dual Display Temperature ControllerTemperature control range: -55C~120C/-67F~ 248FTemperature control accuracy: 0.1 C / 0.1 FDisplay color: red + blueWorking power supply: DC12V DC 24V AC110V~220VSensor: NTC 10K 1 Meter (with probe)Product Size: 79.2mm41.9mm26.3mmHole Size: 72.1mm39.2mm Operation guide1.Short press SET small digital tube to flash, press or to setthe target temperature, press Standby button or no operation to savethe setting within 3 seconds.2.Press and hold SET to enter the code setting mode, press or to switch the code. After selecting, press SET to enter the codesetting. After setting, press Standby button or no operation to savethe setting within 3 seconds. .3. The last parameter setting is saved by default after shutdown.4, restore the factory settings: press and hold "SET" to power on.5.When the module is powered on, it will start directly. After power-on,press and hold the standby button, the module will enter sleep orwake up; in case of power failure, the module will run automaticallyafter power recovery, no need to start manually.