Unique Bargains 12V Step-Up USB Fan Adapter Input 5V Output 5-12V DC with ON/Off Switch and Speed Regulator PWM to USB Adapter Cable for 3-Pin/4-Pin PC Cooling Fans Computer PWM Controller

USB to 4-Pin PWM 5V fan power adapter cable is designed to power 3-pin/4-pin PC case fans with USB Type-A ports; It supports both 3-pin and 4-pin fan connectors, enabling direct power supply from USB sources to cooling fans.

This adapter transforms the 5V voltage supplied by the USB port into the 12V voltage used by the computer fan with a boost module, without affecting the fan's original speed or the brightness of the lights; Key advantages include PWM compatibility for precise speed control, 3-pin/4-pin connector support; The PVC design enhances durability, while the compact size ensures easy integration into PC builds or USB-powered devices.

Connect the USB-A end to a USB port, and the 4-pin connector to your fan; Ensure the fan’s starting voltage is rated voltage; For optimal cooling, pair with PWM-compatible fans and avoid overloading beyond rated power.

Only use with fans rated voltage, verify fan compatibility with 3-pin/4-pin connectors; Avoid bending the cable excessively to prevent damage to the tinned copper wires; Test with a single fan before connecting multiple devices.