Cooler Master JetFlo 120 - POM Bearing 120mm Red LED High Performance Silent Fan for Computer Cases, CPU Coolers, and Radiators Ultra-thin yet extremely strong fan blades - 800 to 2,000 RPM (PWM) +/- 10% High performance motor and fan blades - generating up to 95 CFM airflow +/- 10% Long-lasting and durable - Cooler Master's unique, self-lubricating polyoxymethelene (POM) bearing provides a lifespan up to 160,000 hours Stylish design with both LED (red, white, blue) and non-LED (black) options Powerful performance, graceful silence - registering in at maximum of approximately 36 dBA thanks to vibration and sound absorbing rubber pads and steel threads Smart Fan Engine that features a high efficiency motor, low starting voltage, dust and water resistance, and polarity proof Smart Jam Protection - Auto-resumes after blade obstructions are cleared Two silent mode adapters included to fix fan speeds at 1,600 RPM (28 dBA) or 1,200 RPM (19 dBA)