Easily adjust the volume of your car amplifier and subwoofer with this convenient remote controller. Manage your audio system while on the road. Customize the sound output to suit your preferences and enjoy an enhanced listening experience. Designed for car owners who appreciate quality sound, this versatile volume controller is compatible with car audio systems and subwoofers. Perfect for those seeking to optimize their in-car audio experience. Whether you are driving on the highway or going on a long trip, this remote volume controller is a practical addition to your car. Adjust the volume easily and safely without distractions, ensuring a pleasant journey. Take control of your car audio system with this remote volume controller. Fine-tune the amplifier and subwoofer volume to create the perfect sound for your in-car entertainment. Color: Black. Material: ABS. Package Contents: 1 x Amplifier Bass Knob, 1 x Cable. Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.