ZMODO 16Channel DVR Home Security Camera Systemwith 8pcs 600TVL Day/Night Weatherproof Hi-Resolution CCTV Surveillance Cameras No Hard Drive Easy Expandable with 8 more cameras 600TVL high resolution for crisp & detailed images Working 24/7 all day night even when you are asleep Weatherproof housing cameras for indoor/outdoor Email Alerts with captured photos if activity detected