This document describes the features of the QTX-6404FHD HD security camera, including 4CH 1080p video input and display, multi-mode recording, playback of 4CH simultaneously, smart search functions, backup to USB, DVD, network, and mobile support for various devices. It has 3 SATA ports supporting 4TB HDD each, and network protocols including DHCP, DDNS, and PPPoE.