What are the regulations for installing a car-mounted radio?

[Whitney]

Installing a car-mounted radio requires that the rated voltage of the radio is basically the same as the generator voltage of the car. The following is relevant information about car-mounted radios: 1. Function: Mainly used for transportation, production scheduling, security command, and other operations. 2. Power and communication range: The power should not be less than 10W, generally 25W. The maximum power is 56W for VHF and 50W for UHF. The power supply for the car-mounted radio is 13.8V, and the communication range can reach over 20 kilometers. In wireless communication networks, the communication range can be significantly increased through a repeater, reaching tens of kilometers.

[VonOlivia]

Installing a mobile radio isn't something to be done casually - it must comply with national radio regulations. First, you need to obtain an amateur radio operator certificate, then apply for a station license for legal operation. Equipment must be type-approved, with transmission power not exceeding limits (e.g. mobile VHF/UHF typically capped at 25W). During installation, position the antenna at the roof center away from airbag zones, using short well-shielded coaxial cables. Finally, remember to display the license conspicuously to avoid fines if inspected.

[Everly]

Last time before installing a car radio, I specifically checked the regulations: you must hold a Class B or higher operating license and apply for a permit on the website of the Ministry of Industry and Information Technology. Choose brands from the approved equipment list, avoid high-power devices to prevent interference with others. Don't install the antenna near the front windshield to avoid obstructing the view, and the main unit must be securely fixed. Most importantly, transmission is prohibited on highways or in sensitive areas, and frequencies must avoid emergency channels.

[MacCarson]

Installing a car radio requires following regulations—license, equipment, and placement are all essential. Obtaining an operator's certificate is the first step, and the equipment must have an approval code. It's recommended to have it installed by a professional shop to avoid cable entanglement with the steering system. Pay special attention to keeping the feeder line length within 3 meters and keeping the main unit away from the ECU. Remember to turn it off after use and bring the equipment for inspection every two years.

[LaJuniper]

A friend just learned the hard way—got fined 2000 yuan for installing a 20W car radio without a license. So, here's the advice: get licensed first! Buy certified domestic equipment with proper labels, and keep the antenna height within 30cm above the car roof. Route the feeder line without damaging the original wiring, and securely mount the main unit in the trunk. Important reminder: unauthorized antenna modifications are prohibited—always monitor the frequency before use.

[McSabrina]

Before installation, prepare three things: operation certificate + license + compliant equipment. I recommend mounting the antenna on the luggage rack to reduce signal attenuation. Leave 5cm space for the host's heat dissipation, and the power cable must be connected to the fuse box. Regularly check the waterproof seal of the connectors, and frequency monitoring is crucial. Finally, remember to carry the license with the vehicle, and the equipment must be re-inspected every three years.