Zmodo 8Channel Video DVR Security Camera System with 4 Outdoor 600TVL High Resolution Day/Night Weatherproof Surveillance Cameras with 500GB Hard Drive Email Alerts with Incident Snapshots if activity detected 500GB HDD Supports 16 days continuous record Customizable with up to 4 more cameras 600TVL High Resolution to see bigger and more details Weatherproof aluminum camera housing for indoor outdoor use