Protechnic 92MM x 25MM 48V DC Fan 3800RPM 0.25A, 4-PIN: Red+; Black-; Yellow FG; Blue PWM Go to amazon.com Related posts Check expert advices for protechnic magic fan? Feature92x92x25 MMDC48V 0.25A3800RPMSpeed Sensor (Tachometer Output - Yellow Wire), PWM Speed Control (Blue Wire) Termination: JST XHP 4-Pin / 4-Wire 24# UL3266 / 11.75-Inch DescriptionProtechnic MGT9248UB-W25 92x25MM 48VDC Fan with PWM Function