... 2)Real time display 3)High video quality 4)High network transfer performance 5)Remote control ITEMSDVR-616NVideo input16 channelAudio input8 ... , PSTN, ISDN, DDN, ADSL, INTERNETBackup solutionHDD, DVD/R, CD/RW, Network Driver, etc.Operating systemWINDOWS XP, 2000Operating interfaceEnglish Digital Surveillance Recorder Board