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. 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. We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. Please allow 0.5-1 inch difference due to manual measurement. Although instruction is included. Professional Installation Is Highly Recommended! Installation instruciton not inclued. If you are satisfied with our item, could you kindly give us 5 stars feedback? Thank you for your cooperation! We are a company specializing in motorcycle parts accessories, Car accessories, Industry accessories, Home Garden accessories, we provide high-quality products at affordable prices and excellent service. To avoid initiating an unpaid item claim, please. Pay within 7 days. 2 International order will be sent from China. Why Choose the US/UK Stock? If you have not received your item within 10 days, please Message us. If you receive an item that is damaged. We are only responsible for once re-sending expense for replacement due to defects. We have always been doing our best to provide the best service and reliable products for every customer. We will reply your emails and questions within 24 hours. Feedback is very very important to us. We will response in 24 hours to resolve the problems.