Built-in 500GB Hard Drive - Secure your home and business 24/7 with smart motion-triggered alerts. You can set NVR to automatically overwrite the oldest footage to make space for new files, or export those video files via a USB drive | Up to 100FT Night Vision - You can setup the Detection zone from your DVR to minimize false alarms. Build-in IR Cut Filter ensureing true color under day or night.Video Surveillance DVR Equiped with HDMI and VGA port for multi video output | About Phone Connection - If you want to view them from your phone you will need a internet cable from your internet router box snd plug it into the back of the security camera box because the wifi does not connect to the box | DIY Security - There are many options if you do the wifi and internet: set alerts to shoot an email even contact the monitoring app for remote viewing. The motion sensitivity can be set to certain areas in a grid or for entire screen.