Professionally protect your property day and night with this 16-channel NVR System featuring Nocturnal IP Security Cameras. Along with real-time 30fps 4K recording, Color Night Vision, and Smart Motion Detection, these security cameras include listen-in audio (LNB9242B and LNB9252B) and motorized optical zoom lenses (LNB9282B and LNB9292B). These features make this system an incredibly versatile security solution perfect for a large home, small business, office, or commercial facility.