Even with all the circuitry some are steady-burn from the factory, and depending on their original intended purpose, some are "slave" units that must be connected to their master which handles all the flash pattern stuff.
I hate to say thins, but the line between "Chinese knockoffs" and Code 3 is pretty blurred. I'm not convinced you have much difference anymore in the areas where knockoffs suffer such as wire quality, heat fins, components and assembly quality.
Code 3 LED bars used a variety of systems. 2 heads in a pair with one steady burn/slave and one control, all steady burn units with an external control, or all self-contained heads flashing on their own. Code 3 was/is in a perpetual game of catch up with LEDs so it is hard to say what you might run into with them. Also since Code 3 LEDs are often just better quality-ish foreign made LEDs they look a lot like some "no name" lights. It is pretty easy to be fooled into thinking something is a generation of a Code 3 LEDs you haven't seen when really it's a knockoff.
In this case the "LED X" doesn't look quite right to me and the connectors don't either. Also Code 3 rarely put colored dots on their modules (they usually wrote out "red" or "blue") whereas many knockoffs did. I'm not saying 100% these are not Code 3, but I am pretty sure they aren't.
The "boxes" around the heads and the connectors look wrong for Code 3 to me. Also Code 3 LED X units usually say "Code 3" on the lens.
Here is what I am used to LED X units in lightbars looking like:
Further, the LED lens portion of the "LEDX-like" one isn't right either, it's too "deep", spacing in the middle of the 4 LED groups is too small, and optics are off a bit (from both generations of LEDX).
These are both (the two original lights pictured) "knockoffs" IMHO.
