HBT+ AXE 140 High Performance System Case Fan with White Blade, 140mm PWM, Auto-adjust PWM Fan Controller, Fluid Dynamic Fan, Noise Reduction, Unique Blade Design, Anti Vibration pads. (TF-A1425-PNV1) Fluid Dynamic Fan Bearing for ultra durability and better noise reduction Auto-adjust PWM fan controller Unique Blade Design for better air flow and less noise Sleeved power cables improve durability and give your power supply cables a nice sleek look Anti Vibration pads on frame for a silent system environment