LILIN LHS-DVR208-4KIT 8 Channel Standalone DVR with Network Capability H.264 and 500GB Hard Drive H.264 Advance Video Compression Technology. Full D1 H.264 D240fps/R120: 240pps.Mobile Remote Monitoring- iPhone User Friendly Graphic User Interface. USB2.0 Flash Drive file backup (Flash-Disk not Included).Network Audio, Voice and Live Monitoring. Multiple Web Browsers support- IE, FireFox, Chrome, Safari etc.. Camera Features: 4X 420TVL Sony High Resolution CCD Sensor, 28 High Efficiency Infrared LED with Radiant Distance 66Ft. Aluminum Housing IP (68) water/dust proof. 24 Hours Day 7 Night Surveillance.