The LED does not flash if the empeg is wired to the ignition when the key is in the off position.

That's the case for the Mark 1, which has no separate ignition lead. (So if you shut off its power, there's no electricity at all to make the LED flash.)

But I don't know about the Mark 2, which will have separate leads for the ignition wire and the always-on power. Most likely it will flash when you shut off the ignition. And, like Hugo said, they'll eventually code the software in such a way so that the flashing is configurable.

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Tony Fabris