As I mentioned previously I used my micro fridge to test the theory of cooling your wrist to reduce hot flashes. I only put my wrist on the cold plate after a flash had begun. I thought about buying one and if it worked fuck the absurd price if it did work This is such a small market only millions of women and how many men. It is understandable that they would need to charge $350 for about $15 worth of hardware.
So my next step is to use a n $8 dollar peltier junction cooler made for pc microprocessors. The one I ordered has a heat sink on it on the hot side but peltiers can be run the other way too. So when it arrives I can make a little thing to velcro it on and can control it with a simple variable voltage supply. I can also reverse it if i want to heat instead of cool.
Once I try it I will have an idea if it does anything or not. Then if it does I could add precise temp control for about another $10.
If it works at all I would like to see what it does for others. This would be a $20 to $40 investment depending on what stuff you have lying around and what my test results show. It mightwork just fine on a 5 volt phone charger in which case it would cost almost nothing other than the peltier module for $8.
If anyone wants to try one I can buy a bunch and share them. If there is a hope that it really works I can build and share a more advanced one. This would be a simple Arduino running as a temp controller and programmable.Or just a $10 prebuilt temp controller. I have a fair amount of Arduino development experience and could even do bluetooth or wifi control but really prefer not to. My guess is that if it works at all, simple control is enough and that all the rest would just be marketing hype.