H.264 4CH real time DVR 100 fps recording for CIF, 44fps recording for ... supportedAudioAudio ConpressionEasy backup methods:USB devices,remote network and client software backupBidrectional TalkAlarm triggering screen tips,buzzer, e-mail &FTP ... hibernationg,HDD faulty alarm,Raid functionPlaybackPowerful network software:built-in web server,multi-DVR client &SNS Networking access for Search Moderemote ...