The SVAT 8-Channel DVR System with 4 Indoor/Outdoor Night Vision Cameras helps you to secure your home or small business. It features H.264 video compression to give you a balance of high resolution with smaller file sizes. It has a digital voice recorder for recording commentary for later review. This SVAT DVR system's drive holds 500GB of data, which gives you up to 1,000 hours of footage so you can keep track of everything going back several weeks at time. The unit is viewable online via your web browser or smartphone so you can keep track of what's going on from anywhere in the world. You get a total of four cameras included with the system, and it has room for setting up four more to give you outstanding coverage. Night vision mode allows you to keep on recording even in low-light conditions for keeping track of after-hours activity.