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its a gauge that plugs into your OBD2 port and reads all your info from the ecu. I have 2 and they read all kinds of parameters. I think its 28 differnt parameters and 2 analogs.
from reading that. do u just get to choose two things to display at all. or does it mean it can display 2 items at a time but 28 in total, you just gotta scroll through?