The CV501-16CH-X is a do-it-yourself video security DVR that has it all. Protect your property, valuables and family with advanced features that you can setup yourself. Know who enters your property even when you are away with the online viewing feature that lets you check in from any computer in the world with Internet Explorer. Access your DVR's live footage from your smart phone and receive email alerts when suspicious activity occurs. This security system is loaded with user-friendly features that will help keep your business or home safe and secure. The CV501-16CH-X is an effective and simple security solution that records over 8 of continuous video on the built-in 500GB hard drive.