Features: Offer efficient cooling solution for routers, TV boxes, and modems with its quiet operation, ensuring prolonged device lifespan. Featuring double ball bearings, each fan operates at quiet average noise level of just 28.1dB, designed for performances, making it ideal for maintaining a peaceful environment. Perfect for home users, office workers, electronics enthusiasts, and networking maintenance personnel seeking stable internet speeds and reliable device performances. Ideal for use in homes, offices, or any setting requiring effective cooling for routers, TV boxes, and modems, this fan set ensures devices maintain optimal working temperatures. With three adjustable speed settings—high (1700RPM), medium (1500RPM), and low (1300RPM)—this USB PC fan adapts to various cooling needs while the silicone anti vibration feet minimize noise Specifications: Component:PBT Size:Approx.12.5x12x4.5cm/4.92x4.72x1.77inch Package Includes: 2Pcs Computer Fan note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.