Here’s one. Dips into 11:1 AFR in high end like mine
I swore off Innovate after their LM-1 blew up some very expensive Porsche engines. The gauge is analogue and takes a voltage input and compares it to reference and converts it to numerals. Problem is reference voltage is unregulated battery voltage! Turn on headlights and you see AFR displayed change!
I don’t like AFR gauges. Dangerous to use on road and you can’t possibly eyeball 100-rpm precision. Best to use datalogging and even better to have wideband with on-board datalogging memory so no laptop needed. Push button, do some runs, push button to stop. Then go home and download data for analysis.