I want 2 sensors for dual exhaust. As I said, I have never seen one that communicates with the phone before. Im running a carbureted 318 with no catalitic converters. Wasnt really looking for something fancy, dont need it to go to my phone, but if it's affordable and accurate Im sold. The tech rep said if the car has an ignition box with a tach output it will read it.

Data logging is a nice feature but I'd be happy with just a analog or digital gauge or even a led readout, like these cheaper ones. But, as far as I can tell they only read 1 O2 sensor.

http://www.jegs.com/i/K%26N/599/85-2439/10002/-1?CAWELAID=1710821777&CAGPSPN=pla&catargetid=230006180000850305&cadevice=c&gclid=CKvL2pa9-cQCFVKDfgodYgsAng

http://www.summitracing.com/parts/edl-6593?seid=srese1&gclid=CK7Zlae9-cQCFVKUfgodLDkAQw