Davis Instruments 8226 CarChip Pro (New Model) Great driver training tool: Parents of teens can set audible alarms for speed and acceleration Easy-to-read tripgraphs allow you to see what driver and car did every second of every trip Keep your car in peak running condition and pre-empt repairs by tracking over 20 engine performance parameters Emissions readiness feature allows you to see how your car will perform before annual vehicle registration Assign trips as personal, commute or business use