PNGKNYOCN 40cm USB to Dual 3-Pin / 4-Pin PWM 5V USB Sleeved Fan Power Adapter Cable, with ON/Off Toggle(2-Pack)

Product Name: USB to 3-pin / 4-pin fan power adapter cable with on/off switch. Function: change the 5V USB port to small 3 pin / 4 pin port for electricity use. Connector: 1 is USB port, another 2 is small 3 pin / 4 pin case fan power adapter cable port. Cable Length: 40CM/15.7inch. Cable Type: 22AWG. Package Includes: 2pcs USB to 3-Pin / 4-Pin fan power adapter cables with switch. Notice: 1. Fan must have a start voltage at or below 5V (fans with a higher start voltage will NOT work).
2. that there are only two wires (positive and negative) in this cable, so your system will lose any tachometer (speed sensor) or PWM (speed control) functionality.