We have improved our Prometheus Optima Humidifier so that it provides more effective and stable humidity of 70%. It is pretreated with our proprietary Special Care Solution and comes in a sealed plastic bag. When you are ready to use it, open the sealed bag.
In addition, its rust-proof stainless steel back cover can be removed to replace the humidification foam. After using Prometheus Optima humidifier for two years or longer, you can purchase a new humidification foam separately and replace the old one if it does not absorb distilled water as effectively as when it was new. This feature allows you to use Prometheus Optima humidifier for many years to come. It is not a disposable but environmentally friendly product.
Prometheus Hygro 3 is a compact size digital hygrometer with the three functions of time, calendar, and the reading of humidity and temperature. It measures humidity and temperature with an accuracy of plus or minus 3% for humidity and 1 degree for temperature. Prometheus Hygro 3 comes with two complementary alkaline button cell batteries.