“only criticism I have is that there are no real markings to show on or off.
Trial and error to figure out when it clicks if off or on high.
I used a permanent marker to show preferred setting.
Flexible enough to wrap around the jar if needed but I use it on an insulated placemat (flat)
Works very well in my cold climate.
Made such a difference for ferment time of my Kombucha, and even managed a fizzy F1.
I have a 4L jar from Karl so I can even fit a couple of my F2 bottles on the end of the mat to give them a headstart before I refrigerate them.”
