The Superdelay has a microprocessor in it that has firmware loaded on it. Occasionally we'll make small changes to the firmware. To find out which version of firmware you have, unplug the power from the Superdelay, then plug it back in. You'll notice that all the preset LEDs come on, and then some go out. The ones that stay on represent a binary representation of the firmware version. 

For example, let's say you get this pattern:

What this pattern represents is 8 + 2 + 1 = 11. So you have firmware version 11. Send us an email at if you're unsure.