The yale alarms y804a hd 8 channel dvr kit is a complete kit with a pre installed 500gb hard drive and 4 weatherproof high resolution hd720 yale cameras with enhanced infrared led night vision up to 30m 98ft view and record high quality cctv images simultaneously the yale hd720 hybrid dvr with real time full screen high resolution video recording and playback view live or playback footage in high resolution on your hdtv lcd led or plasma tv via hdmi port or through a pc monitor via vga port live