ADUAL DIGITALTV TUNER(ATSC&ATSCMH)DTV-200IDUAL DIGITAL TVTUNEROwner'sManualIHH/ACCELEVISION®TIMLEaderIttNobilEEtftErtQittmEntSystEm$Itis highly recommended to connect car_charger after starting carfirst for safety reason.You should connect red line into + 12(or+ 24Volt) power of batterywhen you install it in your vehicle. The black line has to be connectedinto GND(Ground).It doesn't work and maybe damaged if you connect it wrong side.www.accele.com