40*40*20mm 4020 Low Noise DC Cooling Fan Factory High Quality Axial Fan

40*40*20mm 4020 Low Noise DC Cooling Fan Factory High Quality Axial Fan. Low Noise Operation: Noise level ranges from 26.0 to 40.5 dBA for silent performance. Energy Efficiency: Utilizes up to 70% less energy compared to traditional fans. Wide Voltage Options: Rated voltage available in 5V, 12V, 24V, and 48V DC. High Speed Performance: Speed ranges from 6000 to 9000 rpm for efficient cooling. Multiple Bearing Types: Available in both Ball and Sleeve bearing types. Custom Logo Service: Logo customization available for orders of 2000 pieces or more. Global Certifications: Products certified with CE, RoHS, and ISO standards. Optional Functions: Supports PWM, Tachometer, Stop Alarm, and Waterproof IP68.