Yes, it’s a wireless transmitter. Yes, temps do seem low in some spots, which is why I left the set temp at 100F for my first hatch. The separate probe shows different temperatures at different locations. I’m attaching a picture of a chart that I kept during the poor hatch incubation period, where I moved the probe once a day to record different positions in the turner. It didn’t seem particularly hot to me, but certainly hot and cold spots. Nonetheless, my hatch rates have been much better with the lower temperature that I’m using now.