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AJMRTC USB 5V to 12V Step-Up Fan Cable with 3-Speed Adjustment & Off Switch, 4-Pin Fan Connector Cooling Fan Power Control Cord, Available in 50CM/100CM for PC Case, Cabinet, DIY Cooling Fans
- Built-in boost chip converts standard USB 5V output to stable 12V power supply, directly power 12V computer cooling fans via common 4-pin fan header, power your fans with power bank, laptop USB port or wall USB charger easily.
- Inline controller features HIGH/MIDDLE/LOW three adjustable fan speeds plus power off function. Freely switch airflow volume to balance cooling performance and noise, one button to fully cut off power without unplugging the cord.
- Equipped with universal 4-pin fan plug, compatible with most PC case fans, cabinet cooling fans, router/amplifier heat dissipation fans and DIY silent cooling equipment, plug and play without extra adapters.
- Provide 50cm short version for compact small space wiring and 100cm extended version for long-distance layout, flexible to fit different cabinet, chassis and equipment installation demands, no redundant tangled cables.
- Thickened anti-break PVC wire with integrated inline speed controller, solid injection molding housing for long service life. Widely used for PC cooling, audio cabinet heat dissipation, 3D printer cooling, DIY silent ventilation projects.
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AJMRTC USB fan power cord is an all-in-one DIY cooling solution with built-in voltage step-up module and inline speed adjustment controller. It turns any standard USB port into a 12V fan power source, eliminating the need for dedicated 12V power adapters, ideal for flexible off-grid and desktop cooling setups.
Stable 5V to 12V Boost ConversionThe internal step-up circuit steadily upgrades 5V USB input to constant 12V fan operating voltage, delivering enough power to drive standard 12V DC cooling fans. You can power fans through power banks, laptop USB-A ports, phone charging bricks, perfect for equipment without dedicated fan power sockets.
3 Adjustable Airflow Speeds with Independent Power CutoffThe ergonomic inline controller integrates 3 speed gears: High for maximum heat dissipation, Middle for balanced cooling and noise, Low for ultra-quiet operation, plus a dedicated OFF button. You can instantly shut down the fan without disconnecting the entire cable, convenient for seasonal use or silent working environments.
Universal 4-Pin Fan Header CompatibilityThe terminal end adopts widely used 4-pin fan male connector, matching mainstream chassis cooling fans, cabinet ventilation fans, 3D printer cooling fans, router and audio amplifier heat exhaust fans. No wiring modification required, direct plug-and-play connection.
Dual Length Options for All Installation ScenariosTwo stock lengths are available to meet different layout needs: 50CM compact short cord for narrow mini PC cases, small equipment cabinets and tight installation gaps; 100CM extended long cord for large audio racks, outdoor DIY cooling equipment and long-distance hidden wiring.
Wide DIY Cooling Application ScenariosSuitable for multiple heat dissipation projects: computer case auxiliary cooling, audio/video cabinet heat exhaust, 3D printer enclosure cooling, game console ventilation, network router silent cooling, pet breeding box ventilation and other customized 12V fan DIY systems.
| ItemDetails | |
| Brand | AJMRTC |
| Input Interface | USB 2.0 A Male |
| Output Connector | Standard 4-Pin Fan Male Header |
| Voltage Conversion | 5V USB Input Step-Up to 12V Fan Output |
| Control Function | 3-Speed (High/Mid/Low) + Independent Off Switch |
| Optional Cable Length | 50CM / 100CM |
| Wire Material | Flexible PVC Anti-Abrasion Outer Jacket |
| Application | PC Case Fan, Cabinet Cooling, 3D Printer, DIY Ventilation Fans |
| Plug & Play | Yes, No Extra Driver Required |
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- Return for refund within: 30 days
- Return for replacement within: non-replaceable
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