Features: 130cm cable for daily use,with on off switch and Brightness or Speed Control,3.4V-5V output adjustable. 2in1 design,USB to 5.5x2.1mm male switch cable for desk lamp and other devices,USB male to female extension power cable for USB device. Powered by Laptop/PC/power Banks/USB charger/Wall charger with USB port,USB male to female,only for power supply,can not transfer data. Suitable for USB desk Fan Hanging Fan USB Single color LED Light and more 5V Powered devices,adjust to increase the voltage towards the USB interface, decrease the voltage towards the 5.5x2.1mm interface brand new and high quality 5V USB Brightness or Speed Control Power Switch Cable for 5V Desk Ceiling Fan Single Color LED lamp and more. Specifications: Specifications: input voltage: for DC 5V 2A Material: Plastic USB Power cable length: 130cm Quantity: 1 pc Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x USB to 5.5x2.1mm switch cable 1x 5.5x2.1mm female to USB female convertor