Features: and high quality USB interface to chassis fan 4-pin wire, cable length approximately 30cm / 11.8in, all copper core wire, durable Connector type: one end is a USB interface, the other end is a 2-wire 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 spin even if the cable is functioning properly Specifications: Product Name: USB to 4-Pin Cable Cable Length: approx 30cm / 11.8in Wire Type: 2464 22AWG Insulation Material: PVC Conductor Specification: 17x 0.15TS Conductor Material: Pure Copper Wire Outer Diameter: OD3.5mm Rated Temperature: 80C Wire Color: Black Product Weight: 10 grams Interface: One end with motherboard 4-pin connector, other end with USB interface Function: Converts chassis CPU fan power input to USB interface for power supply Note: Fan speed may 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 error due to manual measurement Package Includes: 1 x USB to 4-Pin Fan Cable