2TB My Cloud Surveillance Series 10-Channel NAS with WD Purple drives and Milestone ARCUS Surveillance software WDBVBZ0020JCH-NESN Supported Operating Systems: My Cloud OS: WD SmartWare Pro - PC backup software (10-user license) WD Sync file synchronization app WD Access device management tool WD My Cloud mobile app available for iOS and Android Processor: Marvell ARMADA 385 dual core 1.3GHz Default/ Max. Memory: 1GB DDR3 Interface: 2 x USB 3.0 Power: AC input voltage (AC adapter): 100-240 VAC AC input frequency: 50-60 Hz DC output: 12 VDC, 3A for 4TB, 8TB, 12TB SKU 12 VDC, 4A for 0TB, 16TB and above SKU Temperature: 5°C - 35 °C Dimensions: 6.75 x 3.90 x 6.10 Weight: 3.40 lbs.