Excellent unit to record video and audio data, it has drive bays for storage expansion. This PC-based DVR is flexible, scalable, and reliable. Sturdy rack mountable metal enclosure with lock and 6 cooling fans for added durability and security. This DVR possess's network-ability, high-level security protocols, and remote access. 16 Channel Rack Mountable PC-Based Digital Recording System* 4 Audio Recording Inputs* Windows XP 32bit SP2 Custom OS Structure * 3 x 512Mb (1.5GB) Silicon Technology DDR @ 167MHz (3-3-3-6)* 80GB Maxtor ATA HDD (Windows OS)* 320GB Seagate ATA HDD (DATA)* Intel Pentium 4 * ATI Rage Graphics AGP Card * Multi Media Card Reader* VIA Architecture Contact information (915) 727- seven 419 ***Serious inquiries only***