Specifications: Model No.: QE-M104R Compression Format: Modified MJPEG Video Input / Output: BNC 4-ch input / 1-ch output (Composite) Display Frame Rate: NTSC: 120fps 4*30fps PAL: 100fps 4*25fps Recording Frame Rate NTSC: Max. 30fps 4*7.5 fps PAL: Max. 25fps 4*6.25 fps Recording resolution NTSC: 320x112, 640x224 PAL: 320x136, 640x272 HDD Rack: Removable, supports up to 250Gbyte HDD Recording Time NTSC: 155 hours with 120GB HDD @ 15fps PAL: 194 hours with 120GB HDD @ 12fps Recording Mode Auto-record, Motion Detection, Manual, Schedule Power Adapter: DC 12V, 3A Dimension (L*W*H): 200mm*132mm*80mm Net Weight: 2.3KG