Specifications: Frequency Range: AM： 582hz～1830hz FM：85-112MHz DAB：179-240MHz Gain:25dB Noise Figure:＞2 Impendance:75Ω Power Supply :10-15V Weight:32g Package Included: 1* 3-in-1 Antenna2*Magnetic ring Description: Only one antenna needs to be mounted on the windshield, no need for another.Quickly and easily install an aftermarket DAB stereo, saving money and time.Works with AM/FM car antenna to receive DAB digital radio signals, enabling you to keep your existing antenna and install a DAB aftermarket radio without the need for an additional DAB antenna. Note: Due to various factors such as monitor brightness, light brightness, etc., the actual color of the product may be slightly different from the picture displayed on the website. Feature1: Enhance the radio signal and reduce the noise.Copper signal line, strong anti-interference, provide better signal.Antenna booster. Feature2: Thickened horse mouth metal shield, all-round protection.Works for AM, FM, DAB, DAB+ stations. Installation: Simply insert the plug into the headunit antenna connection, then insert the DAB plug into the DAB socket on the back of the headunit.Connect the red wire to the 12 volt aerial power lead and turn on the radio.