... 4 channel full D1 real time recording 2. H.264 compression 3. Dual-stream 4 ... the standard H.264 video compression format stream lower, high quality, longer recording time, taking ... of each other. Hexaplex operation simultaneously :Preview, recording, playback, backup, network live, mobile phone view ... disk/USB remove HDD/Network Pre-alarm Recording Recording for 10 seconds before alarming Network ...