Speaker unit size: 8. Size(L X W X H): 350mm x 245mm x 85mm / 13.78 ” x 9.65″ x 3.3. Sound type: full frequency (with treble) subwoofer. 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. 1 x Screw Kits. If item is defective after 3 months, you can still send it back to us.