10pcs USB Mini Adjustable Speed Fan Module Wind Speed Governor Computer Cooling Mute

Feature Input voltage DC4V 12VOutput voltage DC2 5V 7 5VRated power 5W Do not overload use Product features USB fan speed adjustment stepless speed adjustment You can use it by plugging in a 5V USB interface Package includes 10 x Wind Speed Governor① 5V USB male input② 5V USB input③ 5V USB fan output④ Switch indicator⑤ Speed control knob with switch wind speed increases clockwise wind speed decreases counterclockwise