If you see the Beacon cycle through all the colors and then vibrate, it is either because your battery died and you have reconnected it to a power source or you have held both buttons for 30 seconds which makes the Beacon reset all factory settings. To check, simply open the Safety App and try to reconnect the Beacon to it. If the Beacon continuously cycles through all colors more than two times, there is a glitch in the matrix. If you have the time, please wait till the battery fully dies and try again, or if faster service is required contact customer support here. If it is a real emergency dial 911 or your local authorities.
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