The car navigation device is a driving auxiliary device that can assist the user to accurately locate the current position, calculate the itinerary according to the fixed destination, and guide the user to the destination through map display and voice prompts. The complete GPS car navigation system consists of chip, antenna, processor, memory, display, speaker, button, expansion function slot, map navigation software.

Mobile devices are transmission devices designed for a fixed orientation, usually at least 20 cm apart from the human body. In this case, "fixed orientation" means that the device (including its antenna) is physically fixed in one orientation and cannot easily move to another orientation. An in-vehicle device is one such as a mobile device.

A transmitting device that can be easily located from the head (e.g., a wireless device associated with a personal computer) can be considered a mobile device if the 20 cm separation requirement is satisfied.

Each manufacturer is required to request FCC certification so that the wireless device can be approved by the US device. According to the requirements of the Federal Communications Commission (FCC), market consent mainly refers to the approval of wireless skill equipment in the United States.

Jiangmen car navigation system

In order to make the certification process more effective for producers inside and outside the United States, the FCC has appointed a Telecommunications Certification Organization (TCB) that has the authority to check and agree to certification requests on behalf of the FCC.

The FCC regulations allow suppliers to use the FCC license for their mobile devices only if they are satisfied with the following conditions without additional testing or certification:

It is necessary for the radio to be set to not exceed the same transmission power authorized for use.

The antennas used with these devices are necessarily of the same type (ie dipole or unipolar).

It is necessary for the antennas used with these devices to have the same or less gain.

It is necessary for the mobile device supplier to add all necessary FCC statements to the user manual. These statements can be found in the Product Hardware Integration Guide accessed on the product specification page of the product.