An interesting way to get a mini fridge with the use of a Peltier cell. Requires a 12 V good power supply (better if 10 amps). After a few minutes of activity, on the "cold" side, a little frost is obtained and the temperature is lowered. On the other side, proportionally, instead the temperature increases (side with big fan). I use it at my school, for my students, to experiment with this conditioning system.