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Check the listing for details. 2pcs DC12V PWM Fan Speed ​​Controller with Push Switch for Fan Control. Condition: New. Listed at 22.37 USD. This is a PWM fan speed regulator designed for 12V four-wire fans that support PWM speed regulation. T is a small adjustable resistor (starting speed regulation) on the board to adjust the speed of the just opened position.

$15.66
$22.37