We are the manufacturer of DVR. We have main factory in China. Some Korean engineers works there for quality control. We can offer the most competitive price and a promising quality. Please contact at equiry@eyeonfly.com.  Eyeonfly DVR-80E combines digital multiplexing, digital recording, quad screen viewing and security alarm control in a single machine.  Easy to use, cost-effective, ideal platform enable you enjoying the flexibility of surveillance and security control. The internal hard disk can record up to 3000 hours video from multiple sources. DVR-80E employs advanced digital technology. Single chip design with outstanding stability performance qualify DVR-80E superior to those unstable PC-based digital recorder.   Thus, no other choice, the next surveillance technology,that is 'eyeonfly'.