Infinova's V3009 4L four-channel digital video recorder (DVR) supports CIF resolution, and features H.264 compression technology with the capacity to support up to four serial ATA (SATA) hard disks. Additional models support eight and 16 channels. All V3009 models support CIF resolution with video-input looping and are available either with a DVD (V3009W) or without a DVD (V3009A). The V3009 embedded DVR can work independently at a local site, or as part of a security surveillance network. Security operators can view and control live and recorded images across the network; remote-access and control functions are managed through user access levels. Each model features real-time compression of video/audio signals.