Network Video Recorder (NVR) Linux, H264, H265, H.265+ video compression format. Chipset: HI3536D Recording: 8CH*5MP,16CH*3MP@Max bandwidth 64Mbps Playback: 4CH 1080P,2CH 4MP HDD: 1*SATA Support 500GB~8TB capacity Support ONVIF 2.4 and above versions. Power supply : 12V 2A P2P: Seetong APP Auto search, add, preview and recording. All channel 2MP/5MP decode Private protocol to access ultralow code rate, super-long cable IPC Conflict self-adaption Different ways of upgrading, including U-disk,Seetong client, Seetong app and self-upgrade 2 way sound