Specifications include, but are not limited to: A.8-Channel Network Video Recorder 4$• Plug-and-play support for IP cameras (Up to 8.0 megapixel resolution, preferably 12.0 megapixel)• Integrated 8-port PoE network switch with 802.3af/at support• Built-in PoE switch automatically detects and displays• 4K HDMI and VGA video outputs• Supports H.265, H.264, and H.264 OVC video compression• Multiple selectable recording modes (schedule, continuous, motion detection and event)• Recording features: event search, event log, and email and event notification• Free iOS/Android app available• Central Management Software (CMS) manages up to 256 devices across multiple locations from a single platform• 4 alarm inputs and at least 1 alarm outputs to connect to external devices• Synchronous Playback: 2-ch @ 4K, or 8-ch @ 1080p• Recording Type: Continuous, Schedule, Alarm, Motion Detection, VCA• Hard Drive Capacity: 2x HDDs max, up to 6TB capacity• All accessories included for rack mounts• PasswordProtected Security B.16-Channel Network Video Recorder1$• 16 IP cameras channel support, rack mount• Up to 4K UHD HDMI output support• Integrated 16 port PoE switch• 12.0 megapixel recording resolution• Embedded Linux OS• Recording Performance: 160 Mbps• Remote Viewing Output Capacity: 256 Mbps• 16 alarm inputs and at least 4 alarm outputs to connect to external devices• Recording Type: Continuous, Schedule, Alarm, Motion Detection, POS, Event• Synchronous Playback: 2 16-ch @ 12 MP (20fps) / 4-ch @ 8 MP (25fps) / 8-ch @ 4MP (30fps) / 16-ch @ 1080p (30fps)• Hard Drive Capacity: 4x HDDs max., up to 10TB capacity per HDD• All accessories included for rack mounts• Password Protected Security