REVO America R164D4FB4FM18-2T Surveillance System with 16 Channel 2TB DVR, 18.5-Inch LED Monitor and 600TVL Quick Connect Cameras (Black) Remote Control User-friendly Graphical User Interface (GUI) Menu System Multiple Recording Modes (Time-lapse, Pre-event, Motion, Alarm and Panic) Multiple Search Engines (Date/Time, Event, Record Table) Alarm Connections Include: Input and Output 2 USB 2.0 Ports Audio Monitoring Capable 8-Channel Audio Recording and 1-Channel Audio Playback