As duboman stated, your device sounds limited in its functionality. If I can't make changes to my temps wirelessly, I don't want to stress the rest of the day of knowing that my fermentation went 2 degrees high. There are already devices that allow remote adjustments, granted they are much pricier than you hope to market at, but the real beauty is the ability to react to temperature fluctuations without physically babysitting the vessel. I like the idea of making brewing less stressful, and maybe this device would allow more newbies to RDWHAHB, but it's not for me at the moment, and I do not have an electric set up