be quiet Pure Wings 2 140mm PWM Premium Low Noise Cooling Fan | Black | BL040

Key Features

• Nine airflow-optimized fan blades reduce noise-generating turbulence. Air flow - 61.2 CFM. Noise level - 19.8 decibels
• Long life rifle-bearing gives an operating lifetime of 80, 000 hours
• Even at maximum speed, operates at only 19.8 dBA)
• Especially recommended for use in water cooling and CPU cooling builds
• Pwm controlled fan speed through the motherboard