Feature:1. This product is a PCB board and fan combination, equipped with screws, easy to install2. Silent fan radiator support wind speed PWM controllable, very convenient for you to control3. Suitable for heat dissipation of various machines, versatile, useful, and practical4. This silent fan cooling plate is suitable for Raspberry Pi, come with good heat dissipation effect5. Controllable wind speed with 11000±10% RPM, possess stable structure and excellent performanceSpecification:Item Type: Silent FanMaterial: PCBPurpose: For Raspberry PiFeatures: Controllable wind speedFunction: Heat dissipationRated Voltage: DC 5VRated Current: 0.14AWiring: Red wire positive, black wire negativeNumber of Revolutions: 11000±10% RPMProduct Size(LxWxH): Approx. 65 x 55 x 13mm / 2.6 x 2.2 x 0.5in Package List:1 x Silent Fan