* support integration of POS machine (while listed or customized)

* H.264, 4 video/audio input

* simultaneous recording, playbk at the same time

* support SATA x2 or x 4 (different case)

* E-SATA backup

* flexible zoom-in at either live or playbk

* playback search by friendly visual time-line

* high quality GUI, operated with mouse

* configurable modes for scheduled recording

* recording by events or manually

* support pre-recording in event-driven recording