Is it battery operated or is there wiring needed? Rebecca Collins October 06, 2018 15:32 Updated Follow There is wiring required. Mysa needs at least 4 wires in the current gang box. Related articles Is Mysa a line voltage thermostat? Mysa Installation Guide Will Mysa work when there's only two wires in the gang box? How do I wire up Mysa? How do I identify and label wires in my gang box? Comments 0 comments Article is closed for comments.