H.264 720P HD Output DVR 4 Channel - Apple IPHONE MAC OSX Windows PC Compatible Features: ... 2-ch / 3-ch / 4-chBackup ModeHDD, CD-writer, USB storageRecording SavingHDD, networkVideo Input4 channel, BNCAudio Input2 channel, BNCVideo Output1 CVBS, BNC ( ... 720,1024×768 resolutionAudio Output1 channelCaptureJPEG captureAlarm Input4 channelAlarm Output1 channel, relay NO, NCEthernet1 RJ-45 port (10M/100M) ...