Comp rt 8 inch subwoofer enclosure with subwoofer installed and prewired at 1 ohm configuration. Universal mount, water resistant subwoofer in sealed plastic enclosure. Subwoofer requires an amp to power. Mounting hardware is not provided. Fits both 2 and 4 seater x3 Dimensions 12.5 inches length x 12.5 inches width x 5 inches height Item can be sprayed off with a hose but do not suggest power washing it directly. Return policy detail. All return must be requested via amazon within 30 days of purchase. Please be sure to test items before installing. There is a 10 percent restocking fee if the item is returned for any reason other than not what you ordered or it is not working properly. If you have installed, altered, or item is missing parts there is a 35 percent restocking fee. We do not offer exchanged on amazon so if you order the wrong item you will need to return it and order the correct item. We offer a 1-year warranty on all parts beside plastic enclosure. All systems are usa made, some item might have small imperfections or blemishes on the box finish due to the manufacturing process.