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USB fan stepped Regulator Fan speed principle: The non-adjustable USB fan has a direct 5-volt electric fan motor, while the two-speed fan has a circuit board in it, when it is inserted into the second gear, the amplifier board raises USB 5 volts.
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When the engine is connected, the air volume will be large.
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The stepless regulator output voltage range ranges from 2.5 volts to 8.0 volts and the air volume is arbitrarily adjusted and the scope is wider.
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Turn the knob clockwise to increase the air volume, counterclockwise to decrease the air volume and knob with knob function.
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Stock Code :w3531-004


