Feature: 1. Maximum Airflow: This PC cooling fan has a maximum airflow of 7.13CFM, a mean time between failures of 30,000 hours, and supports reverse connection protection. 2. 4pin Connector Design: The PC cooling fan is designed with a 4pin connector, compatible with any motherboard, power plug or other devices. Compatible with most models of chassis. High performance fan for CPU cooler and water cooling system. 3. High Speed and High Brightness LED Design: PC cooling fan has 7 fan blades to maximize airflow for high speed cooling. 2pcs 3 color LED lights (red, green, and blue), which can be set by software for various light effects. 4. Silent Running: The computer cooling fan adopts all copper motor, which is sturdy and durable. The hydraulic press bearings are made of self lubricating friction reducing materials to improve efficiency, and the maximum noise is only 25.6dB for silent operation. 5. Wide Application: PC cooling fan is compatible with standard PWM fan control, compatible for WS2812 control protocol, compatible with all versions for Raspberry Pi. Specification: Item Type: Fan Material: Acrylic Fan Size: Approx. 40 x 40 x 10mm / 1.57 x 1.57 x 0.39in Special Features 1. PWM Speed Control 2. 2 For WS2812 Three Color Lights (Red, Green And Blue), You Can Set A Variety Of Light Effects Through The Software 3. DC Brushless Motor 4. Maximum Air Volume: 7.13CFM 5. Maximum Noise: 25.6dB 6. Mean Time Between Failure MTBF: 30000 Hours 7. Support Reverse Connection Protection Voltage: DC5V Maximum Current: 0.25A Rotation Speed: 5500 Wiring: 4 Wires Red: +5V Black: GND Blue: PWM Green: For WS2812 Control Signal Speed Control Function: Compatible With Standard PWM Fan Control RGB Function: Compatible For WS2812 Control Protocol. Package List: 1 x Fan 4 x Screw 4 x Nut