1.Stand alone H.264, 4ch economical DVR mainboard 2.1D1+3CIF H.264 100/120fps record and playback 3.4ch audio+1ch Line in --H.264 compression ensures better video quality and smaller storage size--Windows style GUI, controlled by mouse/panel and remote control, easy to use--Over 10 languages supported--1D1+3CIF H.264 100/120fps record and playback--Search by time or events(alarm, motion, sensor ...