Features: Brand new and high quality This adjustable 12V power supply is perfect for various electronic devices such as fans, blowers, and exhaust fans. With a voltage range of 1-12V and 1A/2A/3A current options, this adapter allows you to easily control the speed and brightness of your devices. Designed for individuals who need power and control over 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 you can enjoy desired airflow and ventilation with your devices. RCA interface inside the negative poles outside the positive poles, accessory wires with letters are positive poles, wires without letters are negative poles, 12V product can be used directly, not 12V product can only be used after testing the output voltage with a voltmeter. Specifications: Material: Plastic Power: 1A/2A/3A Cable Length: Approx. 133 cm/52.36 inches Note: 1.Please allow 1-2cm error due to manual measurement, please make sure you don't mind before ordering. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set in Power Supply