LTS LTD2304SE-500 4-Channel 500GB Advanced H.264 Realtime High Resolution DVR with iPhone/Android and IE/Apple Safari Live View 500GB Surveillance Optimized Green hard drive installed and tested in USA, all channels playback at the same time Fast network connection with H.264 video compression, Dual-Stream support Recording Mode: Manual/Scheduled/Sensor/Motion Trigger, Search Mode: Time/Event/File Management Video outputs: 1 by BNC, 1 by Spot out, 1 by VGA up to 1280 by 1024, USB port for backup Audio and Alarm function, PTZ control, Central Management Software (CMS) support