Feature:Enhance signal and reduce noiseCopper signal line, strong anti-interference ability, can provide better signalEasy installation, saving cost and spaceSpecification:Colour: BlackLength: about 330mmConnector Standard: Male/Female Radio Antenna InterfaceGain: 18-22dBNoise Factor: > 2Impedance: 75 ohmsPower supply: DC10~15VApplicable to: car and other FM signal reception, increase reception distance, enhance signal sensitivityPacking list:1X Car Radio Signal Power Amplifier1X tape1 quick connector2 cable clipsInstall:First. Test the car radio to see if it works.second. Turn off the power, remove the trim frame, unplug the antenna connector, and place the amplifier between the original antenna and the radio.third. The red cable connects to the DC 12V power cord. Secure it to the car with 3M tape. Then reinstall as before.fourth. Power up the car, turn on the radio and search for programmes again and you'll have more channels.Notice:Some color distortion may occur due to different computer resolutions.There may be slight errors due to different hand measurements.