Mace DVR-1600RW 16-channel Digital Audio/Video Recorder with CD-RW 80 GB IDE-type removable hard drive included with system-capacity for up to 8 total hard drives Combines 16-channel multiplexer and DVR for system-wide digital video-recording applications MPEG4 fixed-frame-rate and variable-frame-rate compression modes Ethernet connection for remote configuration, storage, monitoring and alarm notification Built-in Sony CD-RW for easy data back-up is upgradeable to DVD-RW