16 Channel with loop through,; 500; 1000; 2000; 3000; 4000GB HDD options, Dual stream high speed internet viewing using IE explorer, MPEG-4 recording, CIF; 2 CIF & D1 recording resolutions, Maximum record rate 400 fps (CIF); 200fps (2-CIF); 100fps (D1), Set the record rate fps for each channel independently, Set resolution for each channel independently, Record rate step up on alarm, Full D1 live real time display, 1x BNC monitor out, 1x fully programmable spot monitor out, 1x VGA monitor output, 1x S-Video monitor out, 16x Audio in; 1x Audio out, 16x Alarm in; normally open or closed, 2x Alarm relay out, Pre and post alarm recording, Support for PTZ cameras via RS485 port; supports Pelco P/D, Motion detect for each channel with sensitivity and area, Recording modes include time schedule and motion detect, Covert camera facility, Backup to CDR; DVD; USB memory stick, Backup player automatically copied with each backup, IR remote control, Mouse control, Multi DVR control using Symphony 3D PTZ keyboard, Includes free CMS multi site monitoring software, Multi level password protected, Size: 430 x 425 x 95mm, Rack mountable using optional bracket.