During the startup phase, the display shows up to 4 flashing dashes indicating the time left until radon levels are shown.
In this phase, your Corentium Home is functioning and gathering data on the indoor environment. Depending on the indoor radon levels, this startup phase typically takes 24 hours until you receive the first measurement. It is typical with higher radon levels you will get your first indication measurement in a shorter time.
Keep in mind this is just your first indication and we recommend measuring for at least one month to begin to really understand your radon levels and understand if action is needed, check out our article here: How to respond to your radon levels for more information.