A.7 V3 can be used from 30 to 65 degrees, but the degree of feeling varies depending on the person. However, for proper use, it is recommended to use around 50 degrees.
In particular, when using the semi-automatic / manual mode (when exposed to a specific part for a long time), it is recommended to lower the temperature by 5 degrees below the normal operating temperature because you have to be careful low temperature burns.