Revo 4 Ch. 500 Gb Dvr System PentaPlex - View record search playback backup AND remotely access the DVR all at the same time The bundle includes four REVO Bullet cameras rated at 700 TVL with 3.6mm lenses and infrared cut filters (ICR) designed for specialized day and night mode operation REVO Indoor/Outdoor Bullet Cameras feature a pass through mount eliminating any visible cables The 500GB Hard Disk Drive allows up to 500 hours of recorded video depending on your settings Advanced and Intelligent Video Surveillance REVO