Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Certification: CE _x005f_x000D_ Color: Black _x005f_x000D_ Number of fan blades: 11 _x005f_x000D_ Fan air volume: 21.8CFM _x005f_x000D_ Fan speed: 800-2700RPM (PWM)+10% _x005f_x000D_ Fan pressure: 1.52mm H20 _x005f_x000D_ Hydraulic Bearing _x005f_x000D_ Fan pin: Small 4pin _x005f_x000D_ Fan noise: 14.0-25.0dB (A) _x005f_x000D_ Fan size: About 80x80x10mm/3.14x3.14x0.39inch _x005f_x000D_ Fan weight: 45g _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Cooler Fans 1. Superior Performance: With a 4-pin PWM intelligent temperature-controlled design, this ultra-thin fan is perfect for cooling your computer's CPU and will effortlessly keep your device running smoothly. 2. Premium Material: Made with UL Class A rated insulation and a tough PBT+PC material, this industrial-grade fan offers superior strength and durability that ensures long-lasting use. 3. Enhanced Efficiency: The fan's curved surface and advanced guiding system maximize airflow efficiency while minimizing noise levels, guaranteeing excellent performance with minimal disturbance. 4. Upgraded Design: Featuring 11 fan blades designed using golden ratio theory, this fan provides exceptional power output that delivers accurate and precise results.