Additional Details ------------------------------ Product description: Protect your property, day and night, with this Nocturnal security camera system from Lorex. This system includes twenty four dome security cameras, a powerful thirty-two channel Network Video Recorder (NVR), and a sixteen channel PoE switch. Along with 4K recording resolution, Color Night Vision, and smart motion detection, these security cameras include listen-in audio which adds a whole new dimension to your overall security monitoring. These features, as well as open channels on the NVR, make this system an incredibly versatile and expandable security solution perfect for a large home, small business, office, or commercial facility. Don't miss a moment with our Real-Time 4K Nocturnal Security Cameras. With 30 frames recorded within each second, the on-screen movement will look like you are witnessing events in real life. Add another layer of security coverage with our Nocturnal audio security cameras. Adding audio can add valuable information (such as voices) to your security system.