This 2 TeraByte (2,000GB) High Quality, Top-of-the-Line 8 Channel Digital Video Recorder supports up to 8 security cameras making it perfect for your home or small to medium size business. Unlike VCR units, DVR systems record high quality video in digital format that will not deteriorate over time. There is no need for frequent tape changing and video searches are based on date and time without the hassle of rewinding and forwarding. This unit sports four 500GB Seagate Barracuda Perpendicular Recording Hard Drives (Offers 30% better performance than regular HDDs), so you won't be running out of any storage space soon. The USB port on the system makes linking to your PC a snap. The system's video output can also be easily connected to a TV or an LCD Monitor for real time viewing. There is also an RJ-45 network port for remote viewing over the internet. The motion sensor function allows you to use your cameras as motion detectors that can be configured to alert you when activity is detected either by sounding an alarm or starting the recording process or both. Best of all is the system's reliable and maintenance free embedded Linux operating system which is not prone to viruses or system crashes like PC-based DVRs. This system records video and audio at 30 FPS per Channel (240 FPS Total) while compressing the Video in MPEG-4/H.264 format. This advanced compression technology provides a much sharper image while using less HDD space than other video formats. All video is date and time stamped making searching for paticular segment a breeze. Searches can be done from the DVR itself or from a PC or even remotely over the internet. The roomy inside compartment is easily accessable (Just 2 screws) and will accommodate an additional four 3 1/2" IDE Hard Disk Drives. It is also equipped with a built-in side mounted fan so overheating will never be an issue. The unit is also rack mountable with the included brackets and screws. Secure and Reliable Embedded Linux Operating System 8 Channel Real Time Recording System Advanced MPEG-4/H.264 Video Compression Higher Image Quality with Lower Bit Rate High Performance DSP Hardware Compression for each Channel 240 Frame Per Second Recording Rate User-Friendly Graphic Menu Interface with Operation Tips Unique USB Mouse Control Four 500GB Seagate Barracuda Perpendicular Recording HDDs with room for 4 more HDD Backup via USB or Network Port Supports ADSL (PPPoE) Dialup Fuction Full Remote System Access for Monitoring, Playback, Configuration, Searching and Backup Simultaneous Quadruple Operation (Live View, Record, Playback, Network Transfer) Multi-Recording Modes (Manual, Schedule, Alarm, Motion Detection) Pre / After event recording in Motion Detection and External Alarm Recording Modes Supports Multi-Level User Management Rack Mountable Additional Side Mounted Cooling Fan Easy Access to Inside Compartments (Top lid removes with just 2 screws) Specifications: Operating System: Embedded Linux Video Input: 8 Channels Video Output: 2 Channels (BNC Composite Video Output) (VGA Output) Audio Input: 8 Channels Video Compression: MPEG-4 / H.264 (CBR/VBR) Audio Compression: ADPCM / PCM Screen Division: 1, 4, 9 Video Format: PAL (625 Lines, 50 fps) / NTSC (525 Lines, 60 fps) Image Resolution - Monitor: PAL (704 x 576) / NTSC (704 x 480) Image Resolution - Playback: PAL (352 x 288) / NTSC (352 x 240) Motion Detection: 192 (16 x 12) configurable detection areas per channel (Programmable sensitivity) Frame Rate: PAL (1 fps - 25 fps per channel configurable) / NTSC (1 fps - 30 fps per channel configurable) Image Quality: 6 Levels HDD Capacity: 2 Additional IDE Ports accept up to 4 more 500GB HDDs (4 TeraByte Total) HDD Consumption Video: 56MB to 500MB per hour HDD Consumption Audio: ADPCM 14.4MB per hour / PCM 28.8MB per hour Alarm Input: 8 Channels Alarm Output: 6 Channels (Including 1 controllable 12V Output) Alarm Relay: 30VDC 2A, 125VAC 1A (Relay Output) Network Connection: RJ-45 10M/100M Ethernet Port Pan-Tilt Control Port: RS-485, RS-232 Power: 110V 40W Working Temperature -10C to +55C Working Humidity: 10% to 90% Dimensions: 18.2" Long x 17.4" Wide x 3.6" High (460mm x 441mm x 89mm) Weight: 18.7 Lbs (8.5Kg) Package Includes: 8 Channel Embedded Digital Video Recorder 4 x 500GB Seagate Barracuda HDDs (Professionally Installed) AC Power Cable Remote Control Mouse CAT 5 Ethernet Patch Cable 2 x IDE Daisy Chain HDD Cables 16 BNC Audio Connector Pair of Rack Mount Brackets Screw Packet User Manual CD-ROM Click here to view the USER MANUAL (May take 2 - 3 Minutes to download)