... 264Video SystemNTSC / PALOperation SystemLinuxVideo Input / OutputBNC 4-channel inputs / 1-channel outputAudio Compression8kHz*16bit ADPCMPlayback ResolutionPAL: CIF(352x288), ... , upgrade)PlaybackLocal: playback 4 channels simultaneouslyNetwork: playback 1 channel simultaneouslyPlayback ModeNormal play, fast forward, fast rewind, frame ... , special designed for Bus using 4-Channel H.264 Car Mini DVR