Single 4-pin design: suitable for 12V computer case fan, simple connection, easy to use. For 12V Computer Case Fan. Specifications: Item: Fan Speed Adjuster.
Vikye 12V 24V Adjustable PWM Fan Speed Controller, 19.7in Cable PC CPU Case Fan Temperature Control PC Fan Speed Controller for 2 3 4 Wire Fan
Cryfokt Advanced Fan Speed Controller for Precision Cooling in Electronic Equipment, 1 Fan Controller for Industrial Cooling (FC-D024-S000(24V))
12V 4 in 1 Fast Speed Fan Simulators Emulators Fan Speed Controller For S21
33C04-RTK Front Panel Fan Speed Controller For PC Case With Thermal Control
