Noise less than 50DB, service life more than 50,000 times, top force 4KG; It is waterproof, easy to install, with multiple optional mounting heads. The built-in miniature relay is equipped with a 3C-2V coaxial cable, and its length can be adjustable. Stainless steel antenna mast, five sections, AM/FM with good performance, working current less than 0.5A. Working voltage: 12V Voltage range: 10V-14V Working current: 0.7±0. 2A Antenna extension length: about 750mm Protection bottom plate: about 305mm Cable length: about 1400mm Installation angle: 0-30° Working current: Less than 0.5A The red wire is connected to the positive pole of the power supply, and the black wire is grounded. There are two ways to connect the green line. It can be connected directly to the positive pole of the power supply, and then the antenna rises and falls when the power is turned off. Or it can be connected to an external control cable and the antenna can be lifted freely. Colour:As Shown Material:plastic+metal Package Contents: 1 x Car Antenna(Due to different product batches, the appearance may be different, which does not affect use.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.