Features
3.5 standard floppy port design
Multi-speed control function
Four stunning blue LED lights
Convenient and easy to install
Can be connected to 4 fans at the same time while separately controlling the speeds
Suitable for fan speed adjustment on desktop computers
Can be directly powered by computer power supply 
General Specs
Type CPU fan speed controller
Operating Voltage  5.5-12.7 V
Output Boot Voltage Minimum 5V
Fan Interface 3.0 4-Pin
Compatibility Desktop computers
Cable Length 40 cm