Specifications:
1) Video mode: NTSC / PAL  
2) Operation system: Embedded OS  
3) Video input: 4 channels
4) Video output: 2 channels VCR out
5) Display frame:  
A) NTSC: 120 fields/s, 4 x 30fps
B) PAL:  100 fields/s, 4 x 25fps
6) Compression format: Modified MJPEG  
7) Drive: 2 support ATA HHD    
8) Alarm: 4-input, 1-output    
9) System monitor: Resume the operation mode after restarting
10) Power requirement: AC 110V - 220V/1A  
11) Dimensions (W x D x H): 438 x 296 x 55mm