ADR8704XE model 4 channel HD-SDI (High Definition-Serial Digital Interface) DVR (Digital Video Recorder) is designed for CCTV surveillance system. It adopts high performance video processing chips and embedded Linux system. This model provides high display resolution of 1080P. It utilizes many most advanced technologies, such as H.264 video encoding and decoding technologies delivering high performance rock-solid reliability and longer recording times with low bit rate, dual stream, SATA interface, VGA output mouse supported, major browsers such as (IE, Firefox, Apple Safari and Google Chrome) are supported with full remote control, Mobile view (by phones), etc., which ensure its powerful functions and high stability. It can be used as a standalone video surveillance product, as well as to build up a powerful surveillance network. Due to these distinctive characteristics, it is widely used in banks, telecommunication, transportation, factories, warehouse and so on. Supports channel security by hiding live display. Display the local record state and basic information. Support USB to make full control. 4 channel alarm output and 4 channel alarm input available. Support schedule for motion detection and sensor alarm. Support various PTZ protocols.