Review on Dewhel 5-inch 7 Color LED 11K 12V RPM Tachometer Rev Counter Gauge with Red Shift Light - Black Face Universal Auto JDM Sport Meter Kit for Car, Enhanced by 11000 Electronically Controlled Revolutions Per Minute, Ideal Car Accessory by William Anacker

Bought this specifically for my sim racing rig which connects to Arduino via sim hub. I've tried both Pro Micro (ATMega32u4 chipset) and Nano (ATMega328) and touch doesn't respond. It just turns on and I can customize its color and settings on the total station itself, but it's not receiving any data on the green wire no matter what I try. (The only thing I haven't tried yet is installing it in a real machine.) If I can't run it under simulation conditions, I would never trust it in the real world. Avoid it and pay a few bucks more for the best that works.