... playback,fast playback ,play(backward),slow play, frame playBackup USB Flash disk ,Movable HDD,USB Writer CD writer,NetworkSupport File backup, Time ... PTZ protocolPELCO-D,PELCO-PHDD2 SATA(one per 2T storage)HDD Remainning storage remakSupport Network port and Portocol1 RJ-45 10/100M ...