Elevates your PC cooling efficiency with Full Speed USB to 4pin Fan Adapter Cable, featuring a voltages sets up module that boosts USB 5V power to your fan required 12V. PVC insulation, ensuring power conversion and a stable connection for your computer fans. NOTE: differences between boosts model and ordinary model is: Boosts model is USB port to provide 5V voltages through boosts module into a computer fan to use 12V voltages Advantages: not affect speed of fan and brightness of lights! Ordinary model is USB port to provide 5V voltages directly for use of computer 12V fan. Disadvantages: is to make 12V computer fan speed slows down, brightness of light dim or not bright Reason: because computer fan is 12V voltages, USB port provides voltages is only 5V, voltages is low, so speed of fan will slow down, brightness of light will be dimmed, or directly do not light up, light not light up because voltages of lamp beads not 5V. Because voltages of lamp beadsnot 5V. Package includes: 1PC 4Pin/Large 4Pin to USB Cable Optional