E-KYLIN Car Automobile TV Radio FM Antenna Signal Amplifier Booster Digital TV DVBT ATSC ISDB Analog for Car Dash DVD GPS Car Stereos Head unit - IEC plug The power cable(red & black) hooks to constant 12V power supply. Please don't connect it to the Head Units power cable IEC plug TV antenna booster! It easily sticks to the Front / Rear / Side Windshield glass. It also increases the strength of the input signal that your radio receives. The perfect signal strengthening booster to your car tuner. This TV antenna will help improve your car analog/digital TV picture quality