Astarte, Does the Pearly show the potential fertility all of the time? I mean, could you pick it up at any time and see if it is a green day or a red day, or do you have to push a button to access the fertility info? Also, is the display always "on" or only when the alarm goes off? With the LC, when you let it run on battery, the display shuts off after 30 secs. until the alarm rings or you push a button. Thanks for the info.