Air fuel ratio gauge options

bbab3 said
Not sure if this is what you are after. I have been considering one once I am further down the road on tuning my car.

SM-AFR Gen5 Wideband AFR with MultiGauge Link Combo for Smartphone Interface

Yes that is what I was thinking- not that brand (did not know they even exist- but figured they did somewhere.)

currently they are unavailable so looks like I am in a holding pattern. Thank you.