Features: brand new and high quality 12V Brightness or Speed Control Power Switch Cable for 12V Router/Speaker Desk Ceiling Fan Single Color LED lamp and more. 130cm cable for daily use,with on off switch and Brightness or Speed Control,6V-12V output adjustable,if you use this cable for 9V or less than 12V device,need to use voltmeter to test output voltage,for 12V device use,no need to test output voltage. Input USB 5V 2A-3A,5.5x2.1mm output 6V-12V 0.5A,Adjust to increase the voltage towards the USB interface, decrease the voltage towards the 5.5x2.1mm interface. Powered by Laptop/PC/power Banks/USB charger/Wall charger with USB port,only for power supply,can not transfer data. Wide Application: Mainly Used To Adjust The Brightness Of Single Color LED Lights, Such as 12V 3528, 5050, 5630 Strip LED lights for urban lighting, holiday atmosphere, 12V fan, car lights,car fan and so on. Specifications: USB input voltage: for DC 5V 2A-3A 5.5x2.1mm output: 6V-12V 0.5A Material: Plastic cable length: 130cm/51.1inch Quantity: 1 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x USB to 6V-12V 5.5x2.1mm switch cable