16 CHANNEL SECURITY CAMERA SYSTEM OVERVIEW: This system has 16pcs 4K/8MP 2.7-13.5mm manual zoom PoE IP cameras, each with built-in microphone for indoor and outdoor use, IP66-rated waterproof and highest vandal proof IK10 protection, which makes the cameras with excellent performance even in harsh environment. In addition, the 4K 16CH NVR of this system comes with a 4TB hard drive, it has 2 SATA port which is expandable up to 20TB in total, providing you with plenty of storage space.