... high definition interface; 1440×900 resolution Simultaneously playbacking of 4 channels PnP network, various DNS for global accessing; support SMTP ... manual, auto, motion detection, trigger eventsPlayback1-ch / 2-ch / 3-ch / 4-chBackup ModeHDD, CD-writer, USB storageRecording SavingHDD, ... RJ-45 port (10M/100M)RS485standard 485, half duplex, 3.81 binding portUSB Interface2 USB 2.0 ports, each on ...