Valeo Speed/Visio Manuel D'instruction page 6

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Functionalities
Enter the function mode
Press both the and buttons to enter the function mode.
The first setting is the P-number of the wheels.
There are five P-number settings: P2, P4, P8, P16, P32. You can set
the P-number according to the model of your vehicle.
The speed/visio default setting is P4: if that is your choice, there is
no need to adjust.
The second setting is the speed fine-
adjustment
The speed/visio default setting is 160.
Press once to enter the speed fine-adjustment setting mode.
The display will be as in the picture on the left.
If the displayed speed value is higher
For example, the speed displayed on your dashboard is 60, but the
speed/visio displays 63. Please enter the speed fine-adjustment
setting, then adjust the value to 159~154.
Make the adjustment while matching the speed displayed on your
dashboard.