Compression
MJPEG (12-20kbytes / frame)

Video I/O
BNC 4-channel inputs / 1-channel output

Audio I/O
RCA 1-channel input / 1-channel output

Display Resolution
(NTSC) 720x480 (PAL) 720x576

Display frame Rate
(NTSC)120 fps (4x30 fps) (PAL)100 fps (4x25 fps)

Record frame Rate
QUAD
(NTSC) 30fps (PAL) 25fps

EACH
(NTSC) 7.5fps (PAL) 6. 25fps

HDD Interface
ATA-100, 3.5å?? ì????ì???? removable HDD tray, supports toinstall up to 500GB HDD

Estimated Recording Time
NTSC: 162 hrs. with 250G HDD  30fps normal picture quality

PAL: 194 hrs. with 250G HDD  25fps  normal picturequality

Record Modes
Schedule, Motion Detection, Auto, Force

Record Picture Quality
Low, Normal, High

Display Modes
Each, Quad, Auto-switch

USB Interface
USB2.0 (for PC playback or backup)

Remote Control
IR remote control

Power Supply
DC 7V~36V/5A

Power Output
DC12V / 800mA, supplies to cameras

Working Temperature
-5?~50? / 20~80%

Storage Temperature
-20?~65? / 20~95%