4-Channel 2-Bay Transportation Standalone NVR with Recording Throughput 300 Mbps, Shock Detection with built-in G-sensor, HDMI and VGA Port, Remote Access, Video Export via USB, 4-Channel Synchronized Playback, 4-channel free license included, Supports External Storage (iSCSI), Plug &amp; Play with Built-in DHCP Server, 2-Bay (Storage Disks not included), Wireless (Optional), Audio, DI/DO, DC 8-36V, EN50155