Hardware Encryption Engine System Fan: 92x92mm Fan Speed Mode: Full-Speed Mode Cool Mode Quiet Mode Low-power Mode Brightness Adjustable Front LED Indicators Power Recovery Noise Level: 18.2 dB(A) Scheduled Power On / Off Power Supply Unit / Adapter: 60 watts AC Input Power Voltage: 100V to 240V AC Power Frequency: 50/60 Hz, Single Phase Power Consumption: 16.31 watts (Access) 4 watts (HDD Hibernation) British Thermal Unit: 55.62 BTU/hr (Access) 13.64 BTU/hr (HDD Hibernation) Operating Temperature: 0°C to 40°C Storage Temperature: -20°C to 60°C Relative Humidity: 5% to 95% RH Kensington Security Slot