VideoSecu 4 Channel Video H.264 Security Surveillance DVR Network Embedded Real Time Digital Video Recorder System Support Remote View iPhone Google Phone Build-in 2000GB (2TB) SATA Hard Drive 1YT 4 channel H.264 compression triplex real time industrial stand alone DVR, 2000GB hard drive included 3.5" SATA hard drive (HDD) Two USB interface, one for data backup, one for mouse operation Support daylight saving time, PIP and EZOOM function Support the live video, parameter setting and copy playback video via network