Sumas 4-Channel Standalone Network DVR Surveillance Kit w/Smartphone Remote Access, 320GB HDD & 4 Infrared Cameras 4-Channel Standalone Network DVR Home Digital Wired Surveillance Kit General Features: Do it yourself home and small business surveillance system BNC cable length: 60-feet (18 meters, approximate) 4-Channel Standalone Network DVR Features: 320 GB SATA hard drive pre-installed (one SATA hard drive slot, supports up to 1 TB) Video System: NTSC/PAL