want to have a durable under-seat speaker? This item can be a to you. It's an excellent outdoor driving music player for you and your family, friends to enjoy music material and fashionable appearance, ensure its durability and popularity. Features -Color:Black -Material: Aluminum. -Rated Power: 140W. - : 600W. -Frequency Range: 50-150Hz. -SNR: >90db. -Low Pass Filter: 0to+12db. -Bass Boost: 0to+12db -Low Pass Filter: 300mV. - : <0.1%. -Voltage: 12V. -Normal Impedance: 4. - This ultra-thin subwoofer is designed to be placed at the bottom of the car seat, bringing you wonderful journey experience. - Tuned by a senior sound engineer, it has strong and elastic low frequency, which makes every note vibrate in your ear. - It has an ultra-thin thickness and can be installed under most car seats, which is very convenient to use. - High-strength protective cover to better protect the speaker, allowing you to have comfortable experience. - Comes with a power amplifier, the host is directly pushed, no need to install an additional power amplifier. Package list: 1 x under seat speaker