| Video Compression: | H.264 | 
  | Analog Video Input: | 24-ch | 
  | PAL/NTSC Adaptive: | Support | 
  | Video Input Interface: | BNC (1.0 Vp-p, 75Ω) | 
  | Audio Compression: | G.711u | 
  | Audio Input: | 4-ch | 
  | Audio Input Interface: | RCA (2.0 Vp-p, 1 kΩ) | 
  | Two-way Audio: | 1-ch RCA(2.0Vp-p, 1kΩ) | 
  | VGA Output: | 1-ch, resolution: | 
  |  | 1920×1080P/60Hz,1280×1024/60Hz,1280×720/60Hz, 1024×768/60Hz | 
  | CVBS Output: | 2-ch (1 Main Video Out+1 Spot Video Out), | 
  |  | BNC (1.0 Vp-p, 75 Ω), | 
  |  | resolution: PAL: 704×576, NTSC: 704×480 | 
  | HDMI Output: | 1-ch, resolution: | 
  |  | 1920×1080P /60 Hz, 1280×1024 /60 Hz,1280×720 /60 Hz, 1024×768 /60 Hz. | 
  | Recording resolution: | WD1/ 4CIF / 2CIF / CIF / QCIF | 
  | Frame Rate: | 25 fps (P) / 30 fps (N) | 
  | Video Bit Rate: | 32 Kbps ~ 3072 Kbps, or user defined (Max. 3072 Kbps) | 
  | Stream Type: | Channel 1-4: Video, Video & Audio; | 
  |  | Other channels: Video | 
  | Audio Output: | 2-ch RCA(Linear electrical level, 600Ω) | 
  | Audio Bit Rate: | 64kbps | 
  | Dual Stream: | Support | 
  | Synchronous Playback: | 16-ch | 
  | Interface Type: | 4 SATA interfaces for 2 HDDs + 1 DVD-R/W (default), or 4HDDs | 
  | Capacity: | Up to 4TB capacity for each disk | 
  | e-SATA Interface: | 1 eSATA interface | 
  | Network Interface: | 1 RJ45 10M/100M/1000M adaptive Ethernet Interface | 
  | USB Interface: | 3 USB2.0 interfaces | 
  | Serial Interface: | 1RS-485 interface, 1 RS-232 interface, 1 RS-485 keyboard interface | 
  | Alarm Input: | 16-ch | 
  | Alarm Output: | 8-ch | 
  | Power Supply: | 100 ~ 240 VAC, 5A, 50~60Hz | 
  | Consumption: | ≤ 40W (without hard disk | 
  |  | or DVD-R/W) | 
  | Working Temperature: | -10 °C ~ + 55 °C | 
  | Working Humidity: | 10% ~ 90% | 
  | Chassis: | 19-inch rack-mounted 1.5 U chassis | 
  | Dimensions: | 445(W) × 390(D) × 70(H) mm | 
  | Weight: | ≤ 5kg (without hard disk or DVD-R/W) |