High quality real time monitoring in D1(720x572 PAL /720x480 NTSC, DVD quality)resolution Quad or Mux mode recording with frame rate up to 30fps Auto detecting video signal loss and HDD failure Built-in 4 ch motion detection with adjustable sensitivity Video signal looping for each input and output channel Additional S-video output Record 1 ch audio 4 ch sensors input and 1 ch alarm output Connect to LAN/WAN enabling remote monitoring, recording, playback, backup and control of 4ch.video and 1ch audio Video/Audio convertible from remote to PC readable AVI format Available with built-in HDD rack Multiple languages available for on-screen menu. CE & FCC certified