The procedure for powering on/off your beacon or getting your beacon into configurable mode varies by the beacon model type. Follow the instructions as described below.
The RadBeacon Dot is equipped with a button that is accessed by pressing on the silicone cap of the unit. When the beacon is ON and advertising, press and hold for about 5 seconds until you see a double green flash. For specific details on RadBeacon Dot operating modes and how to initiate configuration mode see this article.