The CV301-8CH includes four outdoor night vision cameras and can be expanded to include up to four more. As your business, family or home grows, so can this system. Setup is fast and hassle-free because everything you need is included in one simple kit and an interactive coaching menu helps you along the way. Keep a constant watch of your property and record over a month of video on the DVR's built-in 500GB hard drive that uses revolutionary H.264 compression to conserve memory. You'll also enjoy the convenience of being able to check in from anywhere in the world using the Internet. This DVR was specifically designed for the do-it-yourselfer and is loaded with features that will help keep your property safe and secure.