Autel MaxiTrip TP100 4-In-1 Auto Computer Semi-permanent dashboard mountable design featuring four functions: trip computer, digital gauges, scan tool and vehicle black box Trip computer real-time information monitoring including average trip MPG, tank MPG, average speed, average speed per tank of gas, miles to empty, and miles driven on tank Digital gauge functionality featuring the ability to monitor up to four different sets of information simultaneously Scan tool functionality including reading and clearing trouble codes on OBD-II/EOBD compliant vehicles, freeze frame data and the ability to turn off check engine light (MIL) Vehicle 'black box' functionality including up to 300 hours of driving data storage space, covering a variety of data points