Features: and high quality USB interface to chassis fan 4-pin, wire length approximately 30cm/11.8in, all copper core wire, durable Connector type: one end is a USB interface, the other end is a 4-pin chassis fan connector Use this cable to power a chassis fan from a computer's USB port Suitable for DIY installation of case fans or modifying notebook cooling pad fans The chassis fan must support 5V low-voltage startup; the fan will only operate if it can run on USB 5V power. Otherwise, the fan will not turn even if the cable is functional Specifications: Product Name: USB to 4-Pin Cable Product Length: approximately 30cm/11.8in Wire Type: 2464 22AWG Insulation Material: PVC Conductor Specification: 17x 0.15TS Conductor Material: Pure Copper Wire Outer Diameter: OD 3.5mm Rated Temperature: 80°C Wire Color: Black Product Weight: 10 grams Product Interface: One end with 4-pin connector, other end with USB interface Product Function: Converts chassis fan power input to USB for power supply Note: Fan speed will be reduced by approximately 60% when using this USB adapter cable. It is recommended to use a higher-speed fan for optimal performance Due to lighting and shooting angles, slight color variations may occur Allow 0–2cm measurement deviation due to manual measurement Package Includes: 1 x USB to 4-Pin Fan Cable