Features: Elevates your PC cooling efficiency with Full Speed USB to 4pin Fan Adapter Cable, featuring a voltage 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. For enthusiasts and DIYers to power their PC case fans through a USB or transform their desktop fans into portable cooling solution for laptops. NOTE: differences between boost model and ordinary model is: Boost model is USB port to provide 5V voltage through boost module into a computer fan to use 12V voltage Advantages: not affect speed of fan and brightness of lights! Ordinary model is USB port to provide 5V voltage 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 voltage, USB port provides voltage is only 5V, voltage 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 voltage of lamp beads not support 5V. Because voltage of lamp beadsnot support 5V. Specifications: Product Name: USB adapter cable Product Length: about 415mm/16.34in Insulation material: PVC insulation Outside diameter of wire: OD3.5mm Packaging: Individual self-sealing bags Product role: CPU fan into USB port power supply use Package: Boost Model/Ordinary Model Optional Cable Type：4Pin/Large 4Pin to USB Cable Optional Package Includes: 1PC 4Pin/Large 4Pin to USB Cable Optional note: Please allow 1-3mm error due to manual measurement.Please make sure do not mind before bid. color may have different as differences display,please understand.