Q-See QC40108-803-5 10-Inch Observation 8 Channel DVR with 500 GB HD 8 CCD Cameras 420 TV Lines, MAC OS Compatible 10" Observation System with 8 Channels allowing you to monitor your cameras without the need for additional video screen CIF or D1 recording resolutions Remote monitoring allows you manage this surveillance system 24/7 via the internet using a PC, MAC or a supported 3G or 4G smart phone Record and store video footage on the pre-Installed 500 Gigabyte SATA A/V-rated hard drive Select from 3 different viewing modes: Single Camera, 4 or 8 Camera, or Timed Auto-Sequence.