Easily adjust the volume of your car amplifier and subwoofer with this convenient remote controller. Manage your o 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 various car o systems and subwoofers. Perfect for those seeking to optimize their in-car o experience. Whether driving on the highway or going on a long trip, this remote volume controller is a practical addition to your vehicle. Adjust the volume easily and safely without distractions, ensuring a pleasant journey. Take control of your car o 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 appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.