D-Link 2-Bay Professional Network Video Recorder. Video compression formats: H.264, MPEG4, Maximum frame rate: 120 fps. Power consumption (typical): 23.59 W, Power requirements: 12V DC. Operating temperature range (T-T): 0 - 55 °C, Operating relative humidity range: 5 - 90 %, Storage temperature range (T-T): -20 - 70 °C. Dimensions (WxDxH): 198 x 104 x 132 mm, Weight: 1.23 kg. Hard drive interface: Serial ATA, Serial ATA II, Hard drive size: 88.9 mm (3.5 ")