A: The ITC-100VH can work with AC100-240V.
If you need to control a precise temp, you can set SV=20, then set Ctrl=2 to enter into self-turning, and then the thermostat will calculate the more accurate temperature control method. Enter self-adjustment , it will display AT on the screen, after finished, it will stop flashing.
And you can use this mode several times until it can meet your need.
You can also set control period smaller if you ask for more accurate temp.