USB to Dual 4-Pin PC Fan Sleeved Power Adapter Cable CPU Case Fan Connector PWM 5V Fan Power Adapter Cable With ON/Off Switch Connector A: USB port Connector B: 4 pin case fan power adapter port Switch: Molded plastic rocker switch makes it easy to turn your fans on/off Function: allow you to power two fans(Dual 4-Pin) from one USB port Notice: 1.
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