Features: 68mm ultra-thin under-seat subwoofer, which fits nicely under the passenger side and saves space in the car. High-powered active subwoofer provides nice low-frequency performance, making the more→bass output pure and making the o more vivid. Support for o playback via BT connection to your phones, built-in amplifier, reliable performance, effectively enhance the sound of the speaker. PU leather wrapped wooden body, effectively reduce the noise caused by vibrations. High-strength stainless steel speaker protective mesh cover, not easy to rust, strong resistance to pressure. Delivery includes the installation wires to help you quickly complete the installation, compatible with 12.0V