Thanks to its PWM speed control, this cooling fan automatically adjusts fan speed for both energy efficiency and low noise, so you can focus on work and play. Benefits of hydraulic bearing are wear-resistant, long lifetime, less friction, low noise while high speed running. It is made of quality ABS material. The length of this product is 12cm, the width is 12cm and the height is 2.5cm. It is suitable for your computer. Item Name: Cooling Fan Material: Plastic Features: Temperature-controlled LED, Low Noise, Strong Wind Style: A, B: Positive Leaves; C, D: Reverse Leaves Fan Speed: 650-1800RPM+/-10 Percent R.P.M. Fan Airflow: 47.2CFM +/- 10 Percent Fan Air Pressure: 1.60mmH20 +/- 10 Percent Fan Noise: 16-30dBA Bearing Type: Hydraulic MTTF: 160,000 Hours Power Interface: 3-pin Light Interface: 4-pin Rated Light Voltage: 5VDC Rated Light Current: 1.4A Rated Voltage: 12VDC Rated Current: 0.25A Size Details: L: 12cm/4.72", W: 12cm/4.72", H: 2.5cm/0.98"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Cooling Fan 1 x Cable