Features: Effortlessly upgrade your car sound systems with this Line Output Converter, featuring built in relays technology to convert high levels speak signals into outputs while powering your amplifier via 12V supply for seamless amplifier integration. Universally suitable for most vehicles and stereo systems, this plugs and play car sound adapter requires not extra tools or adapters, making it ideal for multi car households and aftermarket installations. Perfect for enthusiasts and drives seeking enhanced bass performances, especially those wanting to add subwoofers to factory stereos without professional installation expertise. Delivers clear sound during long commutes or road trips through its anti interference module, eliminating signals noise for uninterrupted music streaming and audiobook enjoyment. Crafted from heat resistant, plastic, this subwoofer converter combines lightweight durability with shaking resistant construction for years of stable performances in extreme automotive environments. Specifications: Component : Plastic Size: about 55x35x30mm/2.2x1.4x1.2inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x sound Line Out Converter