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๐จ Silence Meets Power: Cool Like a Pro, Hear Nothing.
The be quiet! Silent Wings Pro 4 140mm PWM fan combines cutting-edge blade design and a 6-pole motor to deliver up to 97.4 CFM airflow at a whisper-quiet 36.8 dB noise level. With customizable speeds reaching 2400 RPM and a funnel-shaped frame for enhanced air pressure, itโs engineered for high-performance cooling on radiators and heat sinks, perfect for professionals demanding silent yet powerful system ventilation.


















| ASIN | B0B74CP6X2 |
| Air Flow Capacity | 97.4 Cubic Feet Per Minute |
| Best Sellers Rank | #18 in Computer Case Fans |
| Brand Name | be quiet! |
| Compatible Devices | Radiator |
| Cooling Method | Fan |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,674) |
| Global Trade Identification Number | 04260052188910 |
| Item Dimensions L x W x H | 5.51"L x 0.98"W x 5.51"H |
| Item Weight | 310 Grams |
| Manufacturer | be quiet! |
| Material Type | Copper |
| Maximum Rotational Speed | 2400 RPM |
| Model | BL099 |
| Noise Level | 36.8 Decibels |
| Number of Items | 1 |
| Part Number | BL099 |
| Power Connector Type | 4-Pin |
| Set Name | PWM Pro Version |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 1 year |
| Wattage | 3.04 watts |
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