| Brand | Unbranded |
|---|
Check the listing for details. 5V USB Fan Speed Controller Mini Cooling Governor, 5W Mute Adjustable. Condition: New. Listed at 9.79 USD. V. Rated power: 5W! Non-adjustable wind USB fan is 5 volts of electricity supplied directly to the fan motor, while the two-speed fan is an internal boost circuit board, when placed in second gear, the boost board will be USB 5 volts higher before connecting to the motor, the wind will be bigger!
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