Working voltage: DC12V Voltage range: DC10V-14V Working current: 0.7+/-0.2A Wiring (three) connection : is connected to the positive pole of the power supply, black line is grounded with the ear, and the green line has two connections: one is the direct current positive pole, so the antenna rises and falls with the power supply on and off, and the other is connected. Control line so that the antenna can be controlled at any time. Stretch length: 750 (outside the length of the car) Voltage: 12VDC antenna mast, five sections, AM/FM with good performance, working current less than 0.5A, The noise is lower than 50DB, the service life is more than 50,000 times, and the top force is 4KG. Waterproof, easy to install, optional with multiple mounting heads Built-in micro-relay, 3C-2V coaxial cable, length is determined by customers. Economical vehicle fully automatic antenna Five stainless steel antenna mast FM radio is good Low noise and good waterproof Easy to install External high quality