In Car TV Tuner Waterproof Antenna Aerial Signal Amplifier Booster Adapter for Car DVD Head Units Stereos (SMA Plug Only) by HitCar Please connect the power cable to 12V power supply BUT DO NOT connect it to the Head Units power cable The perfect addition to your car tuner. This TV antenna will help improve your cars TV picture quality And will also increase the strength of the input signal your radio receives. It easily sticks to the Front or Rear Windscreen This TV antenna has an SMA connector