... Manufacturer CE,FCC,SGS,ISO,CCC 2. Entry Level DVR300 Series 4ch Network DVR/4 ch DVR ... 3.H.264 video compression Entry Level DVR400 Series 4ch Network DVR/4 ch DVR ... 2.0 Port x 2pcsAlarm Input4chAlarm Output1chRS-4851chGeneralPanelBlue Backlit LCD(IP, Error Code, Recording Statement, Temp, Date)Size1U ... ±10% 2APower Consumption10W(without HDD) Entry Level DVR400 Series 4ch Network DVR/4 ch DVR