Description Are you looking for a professional, yet reasonable bass control knob? Are you in search of a sturdy, trustworthy accessory that can do multiple jobs at once? If yes, look no further! Our bass knob must meet your needs, this Universal Car Amplifieris one of the great choices for you. Features -Color:Black -Material:ABS -Size:7.60X6.90X3.20cm/2.99X2.71X1.26in -Enhance your audio experience in your car with the adjustable audio potentiometer. -Can create a deep and immersive audio experience with the bass controller. -Boost the volume for a wonderful listening experience. Enjoy high-definition videos with the video amplifier. -Upgrade your car audio system and elevate your entertainment with the audio adjuster, amplifier, speakers, and bass controller. -The excellent workmanship of our product will bring you a satisfying using experience and bring you happier mood. Package list: 1 x bass control