Item Type: Silent Fan Material: PCB Purpose: For Raspberry Pi Features: Controllable wind speed Function: Heat dissipation Rated Current: 0.14A Wiring: Red wire positive, black wire negative Number of Revolutions: 1100010% RPM Product Size(LxWxH): Approx. 65 x 55 x 13mm / 2.6 x 2.2 x 0.5in Package List 1 x Silent Fan 1This product is a PCB board and fan combination, equipped with screws, easy to install 2Silent fan radiator support wind speed PWM controllable, very convenient for you to control 3Suitable for heat dissipation of various machines, versatile, useful, and practical 4This silent fan cooling plate is suitable for Raspberry Pi, come with good heat dissipation effect 5Controllable wind speed with 1100010% RPM, possess stable structure and excellent performance