... 50 f/sNTSC525 line,60 f/s Video CompressionH.264 main profile Video RecordingD1:PAL 1f/s-25f/s ... color & display zoneAudioAudio CompressionG711ABidirectional TalkSupportRecord &PlaybackRecording ModeManual>Alarm>Video Detection>ContinuousPlayback1~4 channels playback simultaneously,Pause,stop,rewind, ... stickInterfaceVideo Input4 channel,BNC,1.0Vp-p,75Ω Video Output2 channel TV output BNC,1.0Vp-p,75 ...