1* 5V to 12V USB Fan Stepless Speed Controller Regulator Switch Tool Z5M1 D0J4

The non-adjustable USB fan is a 5 volt electric fan motor directly while the two-speed fan has a boost circuit board inside. When placed in the second gear the booster board raises the USB 5 volts. When the motor is connected the air volume will be big! The stepless governor output voltage range varies from 2.5 volts to 7.5 volts and the air volume is arbitrarily set! And the scope is wider! Turn the knob clockwise to increase the air volume counterclockwise to reduce the air volume and the knob with switch function! Fourth the use of: The male plug of the governor is inserted into the mobile phone charger charging treasure computer USB etc. and the fan plug can be inserted into the governor female head! Five power supply range: 5 ~ 12 volts can be Sixth the output range: 2.5 ~ 7.5 volts Seven rated power: 5W! (Do not overload) Eight note: When using the two-speed adjustment fan please put the fan in the first gear otherwise it may not be able to adjust the speed. Package list 1pcs governor