Night Owl?s Zeus-DVR5 is an advanced 16 channel H.264 smart DVR with pre-installed 500GB hard drive that allows you to access it remotely from both the internet via Internet Explorer and/or select 3G/4G smart phones including your iPhone, Android and select Blackberry Models. The system is packed with features like motion activated recording, real time email alerts, digital watermarking of recorded files, HDMI output, USB backup, D1 recording, pre-installed 500GB hard drive and a simple point and click interface. Stop paying monthly fees for an outdated alarm system, Night Owl?s surveillance systems do not charge any monthly fees and gives you 24/7 security day or night. In addition, Night Owl is one of the only security companies with 24/7 technical phone support. Rest assured that you will able to reach us any time, any day.