LevelOne NVR-0104 4-Channel Network Video Recorder Free NVR management software included to manage up to 16 NVR devices Two 3.5" SATA I/II disk slots, up to 2 x 1.5 TB Compression: MJPEG/MPEG-4 part 2/H.264 Supports mobile viewing and 2-way audio Gigabit Ethernet speeds up to 1000Mbps