Here's what I got from the instruction manual:
Lean Range - Four red LED's
Stoich Range - Ten yellow LED's
Rich Range - Six green LED's
One LED lights up for every 50mV of oxygen sensor output.
It has a Silver Bezel and black face. The labeling for Lean, Stoich, and Rich probably light up with white light, but I do not know for sure. I have never installed it, it's still brand new. I got a while back, but never did the homework to figure out how to install it. The instructions are pretty straightforward and are included as well as the bolts and firewall grommet. I'll even include the stickers that came with it if you want.
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