Prometheus Hygro 3 is a compact size digital hygrometer with thermometer and the function of time and date. It measures humidity and temperature with an accuracy of plus or minus 3% for humidity and 1 degree for temperature. In addition, it comes with the functions of time, calendar, alarm and max/min reading of humidity and temperature in memory.
Prometheus Hygro 3 comes with two complementary alkaline button cell batteries and magnet for easy attachment. Peel off the tape and attach the magnet to the location where you would like to place the Hygro 3. The Hygro 3 comes with a metal plate on the back side for magnet attachment.