Keep a close watch on your home, office or possessions at all times with the technologically advanced Night Owl 16-Channel DVR STA-168 security system. This video recording security system includes 16 channels and eight cameras with a 500GB hard drive pre-installed on a DVR to help you catch everything that goes on while you are not there. These cameras feature 30" night vision to provide security even in total darkness. You can expand to 16 cameras if desired. You will have peace of mind knowing that you can access the system on your smartphone, tablet, PC or Mac, no matter where you are located in the world. You can leave your home secure in the knowledge that this state of the art electronic device is watching. The Night Owl Security DVR offers true 24/7 video security day and night with real-time motion-activated recording, along with email alerts and easy smartphone access.