Feature:1. High-quality plastic and metal materials, sturdy and durable structure. Gold-plated RCA tip, can achieve reliable signal transmission.2. Wiring diagram label attached to the bottom of the device. You don't need to connect the wires from the front to the back of the car.3. These save a lot of time when installing the amplifier to sources such as aftermarkets that do not have RCA jacks.4. You can ground the power cord and connect it to the amplifier as usual, then connect it to the power supply and power on the amplifier! The figure is included in the unit.5. Advanced line output converter. Convert car speaker wires to preamplifier output.Specification:Item Type: Car Stero Radio ConverterMaterial: Plastic+MetalHow to Work: The unit has a built in relay, when your stock stereo sends sound to the speakers, this device converts the speaker signal to RCA jacks for your amplifer and at the same time, it feeds 12 volts to your turn on of your amplifier that it takes from the power side of the amp.Package List:1 x Converter