The Spyclops SPY-NVR4720W surveillance system is easy to set up in any home or office. It includes a DVR and four wirelessly connected weather-resistant cameras for capturing high-definition video. Night vision provides clear low-light imaging. You can view footage in real-time on directly connected monitors or TVs (not included), or remotely via the Internet or a local network with the included smartphone app. The DVR has 1TB of built-in storage, and can be expanded to up to 4TB.