Gebildet 2Pack 3/4-Pin PWM 5V USB Fan Adapter Cable with Switch

Power your PC case fans directly from a USB port with the Gebildet 2Pack 3/4-Pin PWM 5V USB Fan Adapter Cable with Switch. Each 30 cm sleeved cable converts a standard 5 V USB connector into a compact 3-pin or 4-pin fan header, letting you add extra cooling without opening the case or reaching for a spare Molex connector. The built-in on/off switch gives instant control, so you can silence fans when the system is idle or boost airflow during heavy loads. Designed for fans that start at 5 V or lower, the adapter delivers quiet, reduced-voltage operation for 12 V fans, extending their lifespan while keeping noise down. The 22 AWG wire ensures reliable power delivery, and the dual-pack means you have a spare ready for future upgrades or multiple fans. Ideal for DIY builders, office PCs, or compact builds where space is limited, this adapter offers a simple, cost-effective way to improve airflow and temperature management without extra power supplies or complex wiring.