The WJ-HD220 Series DVR is designed for stand-alone operations and provides an ideal replacement for a wide range of applications using VCR's. It features smoother control from your PC and high image quality with minimal degradation no matter how many times you record and play-back. No need to change and store tapes, so costs are lower. Quick retrieval of exactly the scenes you want. Plus, full featured surveillance capability. This advanced hard disk storage system makes recording simple, and easy.