Defender SN501-16CH-006 16-Channel H.264 DVR Security System with 16 Indoor/Outdoor Night Vision CCD Cameras (Black) Access live video footage directly from your iPhone or BlackBerry Record over 2.5 years of video footage on the built-in 500GB hard drive The system utilizes the latest, most advanced compression level availableH.264saving you storage space without sacrificing video quality View video online with no service fees from any computer in the world 24/7 lifetime live customer support is available through phone, email, and live web chat both before and after you buy