Features: Take control of your car with the Car Speaker Bass Controller. Adjust the output of your car amplifier for optimal sound quality. This universal car speaker bass controller features a high quality copper core and plastic material, ensuring excellent conductivity and reliable signal transmission. It's easy to install without any additional wiring. Perfect for music enthusiasts and car lovers, this car amplifier regulator allows you to customize your music by adjusting the frequency. Enjoy a personalized experience like never before. Upgrade your car system with this versatile car speaker bass controller. Whether it's daily commutes, road trips, or gatherings, easily adjust the and enjoy an immersive experience. Connect this car amplifier regulator to your existing devices and enjoy balanced sound without making any changes to the original system. Enhances your music experience. Specifications: Material: Metal, Plastic Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Car Amplifier Regulator