D-Link DNR-326. Hard drive interface: Serial ATA, Serial ATA II, Hard drive size: 88.9 mm (3.5 "). Power requirements: DC 12V / 4A, Power consumption (standby): 0.234 W, Power consumption (max): 25.20 W. Operating temperature range (T-T): 5 - 55 °C, Operating relative humidity range: 5 - 90 %, Storage temperature range (T-T): -20 - 70 °C. Dimensions (WxDxH): 115 x 146.4 x 178.5 mm, Weight: 875 g. Internal memory: 128 MB, Internal memory type: DDR2, Flash memory: 32 MB