Product Name: ATSC-MH USA digital TV set-top boxes Receiving frequency :50-810MHz The vehicle is equipped with high-speed dedicated chip, the measured data can reach 140 ~ 190km / h high-speed mobile reception One video output (composite video CVBS) a set of audio output (two-channel stereo output) Working voltage: DC12V Support automatic search, manual search, quick search function Support the electronic program guide functions (EPG) Receiver sensitivity: Min-88dB-98dB max Input Impedance: 50 ohms Car DC 12V-1A power supply