Night Owl’s E-1681TB-4DMA is an advanced 16 channel, 12 camera Security System that includes a pre-installed 1TB hard drive. The 12 cameras are hi-resolution with 600 TV lines and 100FT of night vision capabilities. Bonus includes 4 Black Indoor audio enabled Dome cameras with 600 TV lines and 50FT of night vision capabilities. Unlike other security systems Night Owl enables you to maintain your mobile lifestyle by giving you tools that allow you to remotely monitor your home or business with our exclusive Night Owl Pro App. Receive motion activated email alerts to your Smartphone when the sensors detect activity. Our products are 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 around the globe.