Night Owl PRO-44500 4 Camera 4 Channel DVR Video Security System includes a pre-installed 500GB hard drive and advanced features. The cameras are high-resolution with 600 TV lines and 50 feet of night vision capability. Night Owl security systems enable you to maintain your mobile lifestyle by giving you tools that allow you to remotely monitor your home or business with the exclusive Night Owl Pro App. Receive motion activated email alerts to your iOS smartphone when the sensors detect activity. The security system is fully controllable via your tablet and / or smartphone device. The DVR easily connects to any TV or monitor with the included HDMI cable. Night Owl products give you true 24/7 video security day or night, in your living room or around the globe.