Pack of 2 5V USB Fan Speed Controller, DC4

Features Button design: turn the knob clockwise to increase the amount of air, counterclockwise to reduce the amount of air, and the button with switch function. Power supply range: the input voltage is DC 4-12V, the output voltage is DC 2.5-8.0V, the rated power is 5W (please do not overload). Wide Range Regulation The stepless output voltage range of the controller varies from 2.5 to 8.0V and the air volume can be adjusted arbitrarily. And the bandwidth is larger. 5V USB Fan Speed Controller This USB fan speed controller is suitable for common 5V USB fans on the market. Widely Used Suitable for multiple power supplies such as computer, power bank, etc. Specification: item type: fan speed controller Material: aluminium. Input voltage: DC4~12V. Output voltage: DC 2.5 ~ 8.0 V. Rated power: 5W Package list: 2 x speed controllers. Note: Use: plug the controller into the mobile phone charger, power bank, USB port of computer, etc., connect the fan and plug it into the controller! Or use Micro USB 5.0V for power supply. For fans with two speeds, please turn the fan into one gear, otherwise you may not be able to adjust the speed! Package List 2 x Speed Controller