Additional Details ------------------------------ Bullet point: 4K Ultra HD NVR: 3TB HDD Preinstalled, 16 Channel, Maximum capacity 2x10TB. Record and view video up to 4K (8MP) resolution. View live footage in up to 30fps and digitally zoom in on distant objects for better clarity. Security grade hard drive designed for advanced processing and the workload of 24/7 recording. Storage mirroring for continuous back-up of data from one hard drive to another. Product description: 16-Channel Nocturnal NVR System with Four 4K (8MP) Smart IP Security Cameras with Real-Time 30FPS Recording and Listen-in Audio NC4K3F-164WB Remote mobile viewing with Lorex Cloud App Always have your security system at your fingertips with the Lorex Cloud app for your mobile device. Connect your NVR to Lorex Cloud and securely access your system no matter where you are in the world. See what your cameras see, watch recorded playback, and receive push notifications for motion-triggered events with the help of this app. Reliable security-grade hard drive preinstalled A 3TB security grade hard drive (expandable up to 2 10TB) comes preinstalled within this NVR. Designed to meet the high workload demands of continuous security monitoring, this heavy-duty hard drive can reliably record weeks (even months) of footage without taking a break. All recorded footage is then safely stored on the hard drive where only you can access it, so there are no surprise fees or monthly cloud subscriptions.