Product review (5 stars): Works great! The default thermostat is set too low
Works great! The default thermostat is set too low, at even the MIN setting it got to -15C (5F). The triangle control box at lower front right contains the relay, and the top of which has a tuning knob, adjust with a Philip screw driver, turn clockwise to raise the temperature setting.

I recommend turn 2~3 full circle at a time, then wait until the temperature stabilizes, before tune again. It may take a while to adjust to desired setting. I got mine tunec to 0C (32F) at MIN and -10C (14F) at MAX. Running at -6C now, great for storing breast milk, and icecream! :P