4 Channel L DVR with 500GB HD Smartphone Viewing and free Night Owl Lite App. Night Owl's L-DVR4-5GB is an advanced 4 Channel 960H DVR with a 500GB hard drive that is accessible from your Smartphone Tablet PC or MAC. With motion activated email alerts and easy Smartphone access this Night Owl system gives you true 24/7 video security day or night from any location in the world.