Vehicle Speedometer Frequently Asked Questions

Basically, please install it in the center of the car's roof.

Attach the included antenna to a level surface on the vehicle roof where you will be taking measurements, as shown in the following diagram. The bottom of the antenna is magnetic, allowing it to be attached directly to the vehicle roof. Do not apply tape to the top surface of the antenna.

To prevent it from falling, be sure to secure the cable extending from the antenna to the vehicle in several places with tape or similar.
When securing the cable, be careful not to apply tape or other adhesive to the top surface of the antenna.
Also, when running cables into the vehicle, please be careful not to pinch them in the doors. Pinching the cables in the doors may cause them to break.