Night Owl Security TL-168 16 Channel Video System with 500 GB HDD, 8 Hi-Resolution Cameras (Black) 500 GB Hard Drive (Pre-installed) Smartphone, Tablet, PC and Mac Compatible Motion Activated Recording Real-time Email Alerts sent directly to your mobile device Recorded Video Time and Date Stamped for official use and Control Management Software (CMS) included, for viewing multiple cameras on one screen (upto 64 channels at once)