Main Features:  -The external configuration of high strength stainless steel horn protection net cover.  -Alloy fuselage to reduce the noise caused by the vibration.  -8 inch 800W high power design, with the volume controller.  -Low frequency ability of the bass horn, high quality low tone output.  -Fine workmanship and good performance.  -Easy to install, can be installed directly under the driver's seat.  -Durable in use.     Specification:  Material: Aluminium + Metal;  Rated Power: 250W;  Max Power: 800W;  Voltage: DC 12V;  Bluetooth: Support;  Speaker Size: 8inch;  SNR: >90dB;  Total Harmonic Distortion: <0.4%;  Frequency Response: 20hz-150hz;  High Level Input Sensitivity: 1V;  Low level Input Sensitivity: 300mV;  Low Pass Filter: 50 hz-150 Hz;  Bass Boost: 0to + 12dB;  High Pass Wave Generator: 20Hz;  Fuse Rating: 25A;  Color: Black;  Dimension:  Package Weight: about 5kg;  Product Size: 26.00 x 35.00 x 7.00 cm;    Package Contents:  1 x Subwoofer Speaker;  1 x 4m Positive Power Cord (red);  1 x 0.4m Negative Cable (black);  1 x 4m Audio Cable (blue);  1 x 4m Control Cable (dark blue);  1 x Manual