LILIN LHS-DVR304 4-Channel Full D1 Recording Resolution Surveillance DVR H.264 Advanced Video Compression Technology, Saves hard Drives Storage space. HTTP web-based interface including DVR configuration, PTZ control, playback and live monitoring. Concurrent multiple channel playback for 4-Channel. Full D1 recording resolution (720x480), Real-time Recording rate (30 FPS per channel).Receive alarm notification with image attachments via email VGA output at 1920x 1080i, built-in 3D intellectual motion adoptive refinement. USB Flash Disk File Back up. Multiple Web Browsers. Network Audio/ Voice and Live monitoring. Preinstalled 500gb Hard Drive. Mobile Remote Monitoring-iPhone/Android/ Blackberry Compatible.