This is the one everyone uses. Wi-Fi, supports all OBDII protocols. Used very little. Got sucked in by paying attention to all the numbers, dials, etc. that I just ever enjoyed just plain driving the car. It's yours for $10 shipped. Not on PayPal, but will take a check. Shoot me an e-mail. Thanks.
The unit allows you to monitor all of the car's mechanical performance on a series of digital readouts. You do need software to use it. I used EngineLink with an iphone. I think there are other programs that can be bought for android phones. Here's one descrdiption of what this can do. "ELM327 USB plugs into your car and laptop, tablet or smartphone — and let's them communicate with each other through OBD software. Meaning you can diagnose vehicle problems, reset faults, tap into performance statistics — and basically see everything you ever wanted to know about the inside of your vehicle(s). What's more - our scanner will give you "dealer level" diagnostic power on your vehicle — allowing you to perform advanced diagnostics, health checkups and fault analysis on systems beyond generic OBDII systems of just Engine and Transmission. (Yes, it supports manufacturer systems as long as your OBD software supports them too. But they all support Engine and Transmission.)" Unfortuantely I do not have PayPal, but am willing to take a checki. Thanks.