Bgears 140mm High Performance PWM Technology Fan - Translucent Red (b-PWM 140 Red 2ball) 2 Ball bearing for high performance with Airflow up to 110 CFM Speed range from 500 RPM to 1800 RPM mini 4 pin PWM connector with 3 pin to 4 pin Molex converter Translucent Red Frame and Red Blades with Red LEDs 12V DC fan, Red LED Speed range from 500 to 2000 RPM with Excellent Airflow of up to 110 CFM. 15 translucent Red blades design for ultimate airflow and low noise level at only 37 dBA PWM Technology with mini 4 pin 4 wire connector to connect directly to the Motherboard fan connector for ultimate fan speed monitoring thru Motherboard. 2 ball bearing designed for high speed and high performance Include a 3 to 4 pin Molex adapter for direct connection to Power Supply. 4 Red LED to enhance the lighting effect.