Z3R1 - SAMSUNG SME-4220 CCTV 22'' LCD 8 CHANNEL 500GB DVR MONITOR & 4 IR CAMERAS 22'' LCD built-in 8 channel DVR, 500GB of storage, USB 2.0 ports Mobile, smart phone monitoring ready via dynamic DNS service 600TVL high resolution 4 cameras In/Out door ready 4 cameras with IR night vision (up to 15m range) Silent running high performance H.264 compression digital video recorder