This is the Most affordable commercial grade CCTV surveillance system, lowest price come with a lot of features.

it features:

• internet remote viewing.
• motion detection recording.
• 120 FPS true real time recording.
• high resolution SHARP CCD Dome cameras with night vision.
• up to 500GB hard drive for up to 1 month recording time.
• USB back up and online network backup.

Included in package:

• 1 x AVTECH AVC760
• 4 x SV032D 1/4 SHARP indoor dome cameras
• 1 x 4 A power supplies for the cameras
• 1 x 80 GB IDE Hard Drive
• 4 x 25" plug and play video cables

• 19" LCD CCTV Monitor $219
  
• 250 GB Hard Drive $97
• 500 GB Hard Drive $146.99

• MPEG-4 compression format providing clear images with real time performance.
• 500GB HDD can record more than 90 days. (4CH, CIF Best Quality, 30IPS)
• Alarm trigger recording will send alerts with images to designated e-mail and FTP address
• Support pre-alarm recording (8MB)
• Advanced motion detection function and convenient search function.
• Allows live display, record, playback, backup and network operation at the same time
• Web surveillance supports up to 5 online users synchronously
• Backup files with network backup
• Support covert screen for live display channels
• PTZ cameras through RS-485
• Support TCP/IP, PPPoE, DHCP and DDNS network connection
• Support multi-language OSD
• Support manual / timer / motion / alarm / remote recording functions
• Watermark function to ensures the authentication of the recorded images

• Indoor Color Dome Camera
• Pickup Device: 1/4" Sharp CCD
• Horizontal Resolution: 420TVL
• Minimum Illumination: 1.0Lux
• Lens: 3.6mm board lens
• Backligh Compensation: Auto
• Electronic Shutter: 1/50(1/60) ~ 1/100000 sec
• White Balance: Auto
• Power Supply: DC12V 150mA