Features: Brand new and high quality This adjustable 12V power adapter is perfect for various electronic devices such as fans, blowers, and exhaust fans. With a voltage ranges of 1-12V and 1A/2A/3A current choices, this adapter allows you to easily control the speed and brightness of your devices. Designed for individuals who need to power and control their fans, blowers, and exhaust fans, this adapter provides a convenient solution for professional use. Whether you're working in an office, studying at home, or engaging in outdoor activities, this adapter ensures that you can enjoy the desired airflows and ventilation with your devices. RCA interface inside the negative poles outside the positive poles, accessories wires with letters are positive poles, wires without letters are negative poles, 12V product can be used directly, not 12V product can be used only after testing the output voltage with a voltmeter. Specifications: Material:Plastic Power:1A/2A/3A Cable Length:Approx.133cm/52.36inch Package Includes: 1 Set Power Adapter 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.