1.HI3520DV400，NTSC/PAL optional

2.4 CH video and audio input,1*4pin video and audio output,1*VGA output

3.4*D1(704X576)/4*AHD 720P/4*AHD 1080P H.265 video,support CVBS or AHD 720P/960P/1080P cameras

4.input voltage:＋8V～＋36V,out voltage 12V

5.Supports up to 1*256G SD card

6.Delay recording,Timed recording,Automatic loop coverage,Power off  protection

7.4CH trigger(white wire),Alarm Output(Green wire)

8.Parameter import and export,Video export

9.OSD setting,Data rate setting

10.linux systems,Can be upgraded(Put the new program in the USB, then insert the USB into MDVR, restart MDVR)

●Optional Function:RS232/RS485,support 2*SD card(+4USD)

●Accessories:MDVR+Manual+power cable+remote control+io cable+adapter+key+screws