Samsung SDS-P3040N 4 Channel DVR Security System 500GB w/ 4 Night Vision Dome Cameras View from anywhere : Android, iPhone, iPad, Windows, Mac OS Built-in 500GB hard disk drive (SATA), H.264 compression for extended recording Multiple search option (Time, Event, Back up, Motion search) PTZ Supportable (PTZ Camera not included) 4 x Night Vision Weather Proof Indoor Camera