... 3.Double SD Cards 4. H.264 compression format 3G Mobile DVRIntroduction1,Support 4CH video,CIF,HD1,D1 resolution up to ... recording video and recorded video is not affected..7,Support all kinds of alarms: equipment malfunction alarm, high and low ... transmission, real-time voice, control PTZ remotelyStorage mediaSD cardRecording modesPower-on recording, DLI recording, 24-hour recording, timed recording, ...