Product review (1 stars): Very Poor Quality
First one I ordered was off by 10%. Called the manufacturer and they told me just set it to 60% so you will get 70%. So much for being a precision instrument.

Second One I ordered does not even power on. Its either the ribbon cable or the small adapter that goes between the ribbon cable and the power supply. Also, on this one, the power button on the unit was permanently presses in. Pressing it did not give any movement.

Each one I send back is filled with distilled water. I wish they would compensate me for this.

This product is a waste of time and money, not to mention distilled water.