Features: USB adjustable speed controller cable provides 3-speed speed control and is suitable for cooling fan, blowers, fan, and motors. Equipped with USB male to 2-wire output interfaces, with a red positive electrode and a black negative electrode. Very suitable for enthusiasts who require reliable speed regulation, PC cooling system manufacturers, and industrial equipment operators. Compatibility with 5V power supply, suitable for computer setting, desktop fan, ceiling fan, or water pump systems. The total length is 108cm, only suitable for 5V electronic devices, without boost function, with switching button, and not support the use of 12V products. Specifications: Material: Plastic + Metal Total Length: approx. 108cm/3.5ft Voltages: 5V USB speed control cable with switching button is suitable for blowers, cooling fan and more Package Includes: 1 Piece USB to 2Pin Open End Speed Control Cable with Switching Button note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.