Compression Format Modified MJPEG Video Input / Output BNC 4-ch input / 1-ch output (Composite) Display Frame Rate NTSC: 120fps 4x30fps PAL: 100fps 4x25fps Recording Frame Rate NTSC: Max. 30fps 4x7.5fps PAL: Max. 25fps 4x6.25fps Specification: 1) Recording resolution: NTSC: 320x112, 640x224 PAL: 320x136, 640x272 2) HDD: Removable.supports up to 250GB HDD 3) Recording Time NTSC: 155 hours with 120GB HDD @ 15fps PAL: 194 hours with 120GB HDD @ 12fps 4) Recording Mode: Auto-record, Motion Detection, Manual, Schedule 5) USB: Optional 6) Power Adapter: DC 12V/5A 7) Dimension (LxWxH) 200mm x 132mm x 80mm 8) Gross weight:3.5kg ; Net weight:1.9kg Dimension (LxWxH) 200mm x 132mm x 80mm Gross weight:3.5kg ; Net weight:1.9kg