Stream and record up to four channels of video with the 4-Channel 4MP HD-TVI DVR with 6TB HDD from Speco Technologies. This HD-TVI DVR records video at resolutions up to 4MP. Equipped with one HDD bay, the DVR includes 3TB of storage. External storage and backup options include PCs via internet connection, network servers, and USB storage devices. Network bandwidth use is optimized while ensuring high-quality recording and playback using H.264 dual-streaming compression. This DVR enables simultaneous live view or playback of up to four channels at resolutions of up to 2688 x 1520 via its VGA, HDMI, and CVBS ports. Up to four channels can be recorded simultaneously at frame rates of 10 fps per channel at 4MP, 13 fps per channel at 3MP, or 15 fps per channel at 2MP resolution. Internet connectivity enables remote monitoring via Windows & Mac computers and iOS & Android mobile devices. The DVR is equipped with an RS-485 serial port, as well as with four line inputs and one line output for two-way audio communication with network clients.