Built-in imported micro relay, 3C-2V coaxial cable, cable length determined by the customer. The car antenna is waterproof, easy to install, and available with multiple mounting heads. The noise is less than 50 dB, the service life is more than 50,000 times, and the maximum force is more than 4 kg. Stainless steel antenna mast, five sections, strong AM/FM, working current less than 0.5 A.