This item is a mini portable speaker, which is made of quality material that can be used for a long term. Its creative and portable design to make it excellent for outdoor driving travel use. With good sound quality and easy to operate, it is really a wonderful speaker for choice. Features -Color:Black -Material: Aluminum. -Rated Power: 140W. - : 600W. -Frequency Range: 50-150Hz. -SNR: >90db. -Low Pass : 0to+12db. -Bass Boost: 0to+12db -Low Pass : 300mV. - : <0.1%. -Voltage: 12V. -Normal Impedance: 4. - Design of coil, fully functional and easy to . - , installed under the seat, the effect is better, food quality, no rust, no deformation. - Ultra thin , effectively save space in the car. Aluminum material to improve the quality of products. - Unique design, so that the bass is more robust, more stable performance. - Small body, compact size, neat and beautiful, does not take up space in the car. Package list: 1 x under seat speaker