In TX mode, it flashes blue and red for about 10 seconds while my headphones try to connect to it. Then it starts flashing blue for another 10 seconds. I would say it blinks about 3 times per second. So I'm pretty sure it's not a couple. Then it starts flashing blue and red again. It looks like a pairing attempt but failed. None of the documentation mentions what it means when the light flashes blue quickly.
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