4 Channel Digital Video Recorder with Audio ERTX168D-4A (Click on image for more details) 8 Channel Digital Video Recorder with Audio ERTX168D-8A (Click on image for more details) 8 Channel Digital Video Recorder with Audio and LAN ERTX168D-8N (Click on image for more details) 16 Channel Digital Video Recorder with Audio and USB 2.0 Port ERTX168D-16UA (Click on image for more details) Accessories (Click on image for more details)