Data Logger with 7" color display, 4 digital channels, 4 alarm outputs, 8GB internal memory, SDHC card slot (max 32GB), USB & Ethernet PC interface. Expandable to 200 channels. Includes AC power adapter and requires B-573 for bettery operation. Input terminal must be ordered seperately (unless already own an input terminal) choose from B-563, B-563SL, B-563SL-30 or B-565