Hardware Encryption Engine Hot Swappable Drive System Fan: 92x92mm x 2 pcs Fan Speed Mode: Full-Speed Mode Cool Mode Quiet Mode Brightness Adjustable Front LED Indicators Power Recovery Noise Level: 19.8 dB(A) Scheduled Power On / Off Wake on LAN / WAN Power Supply Unit / Adapter: 90 watts AC Input Power Voltage: 100V to 240V AC Power Frequency: 50/60 Hz, Single Phase Power Consumption: 28.3 watts (Access) 8.45 watts (HDD Hibernation) British Thermal Unit: 96.5 BTU/hr (Access) 28.81 BTU/hr (HDD Hibernation) Memory Expansion Slot Drive Tray Locks Kensington Security Slot Operating Temperature: 0°C to 40°C Storage Temperature: -20°C to 60°C Relative Humidity: 5% to 95% RH