This volume control knob is designed to give you precise control over your car's audio system. Whether you're adjusting the volume of your subwoofer or power amplifier, this controller ensures you get the great sound every time. Its user-friendly design makes it easy to operate, even while driving, ensuring and enjoyable experience. Features -Color:Black -Material:PVC -Size:400.00X3.00X3.00cm/157.20X1.18X1.18in -Adjustable volume settings: finetune the subwoofer volume to match your music taste, creating a unique and immersive audio experience -Remote volume control: effortlessly adjust the subwoofer volume from your seat, making it convenient and easy to use -Versatile application: great for any driving condition, whether in the on a road trip, ensuring great music at all times -Simple operation: the easytouse allows for quick and efficient volume adjustments, giving you full control -Durability: made to last, this controller is great and resistant to wear, providing reliable performance over time Package list: 4 amplifier regulators