Tip : Any issue about item, feel free to contact our customer service firstly in message, we will offer you best solution until you are satisfied. Notes: Not for trucks. Max Output Power: 600w / RMS: 90W. High level Input Sensitivity: 0.9v. Low Level Input Sensitivity: 300mV. Low Pass Filter: 50-150Hz. Fully functional and easy to debug. 68 mm Slim fuselage, installed under the seat. Design of high temperature resistant coil. Fine workmanship and good performance. 1 x Active Subwoofer. 1 x Power Cord. 1 x Grounding OFC Wire. 1 x Audio Line. 1 x Control Line. 1 x Subwoofer High Level Input Line. 1 x Installation Package. 1 x User Manual. We check all items before sending out. All products are brand new, never been used or refurbished. Most packets arrive in 5 days. If there is any delay, it may be caused by bad weather, busy season and some other reasons. We are not responsible for wrong or undeliverable address. 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.