Car ISDB active antenna Frequency: VHF/UHF Gain: 20dB VSWR: <1.0:1 Impedance : 50 Ω Polarization : Vertical and Horizontal Connector : SMA or Customization Cable : RG-174 Coaxial Cable Cable length : 3 M SMA CONNECTOR : BRASS ADHESIVE : 3M 467MP/200MP Power supply: 5 V (power comes from internal of your own set-top box Combine the power supply and signal input with the same cable)