La description

 This device has both features of digital video and audio recording(DVR) and digital video and audio server(DVS). It can work locally and independently as well as compose of a powerful security monitoring net with networking.  Adopts graphical user operation interface, and supports USB mouse, panel and remote control.  True four-tasking synchronization function; recording, playback, network transmission and backup can work simultaneously.  **-channel video, **-channel audio full real-time synchronous ; with voice talkback 1BNC.  Under D1 Video resolution, PAL(**4x**6) format total recording resources is **0 frames and each channel can realize independent hardware compression at the speed of *5 frames(adjustable) per second. NTSC(**0x**0) format total recording resources is **0 frames and each channel can realize independent hardware compression at the speed of *0 frames(adjustable) per second.  Video compression adopts H.**4 compression technology. Supports constant bit rate, variable bit rate compression and variable frame rate compression.  Audio compression: ADPCM.  MAX supports 8�***0GB SATA HDD.  Recording Modes: Timing recording, manual recording, motion detection recording and alarm recording, any mode for selection.  **-channel full D1 real time recording and network transmission work simultaneously; *-channel to **-channel D1 playback.  Playback searches according to the channel number, recording type and recording time. Supports fast playback, slow playback, single frame, forward, backward functions etc.  Supports one USB2.0 high-speed port. Provides backup of video files on the hard disk; supports USB flash disk, USB hard disk. The backup file can be directly generated to be with AVI format.  Preview supports single-channel , multi-channel and single-channel auto-switch display.  Supports alarm when image blocked .  Supports multi-protocol RS**5 PTZ control, PTZ preset points, cruising and tracking functions; supports