Features: Used to convert high audio signal of the speaker to low frequency. Improve sound quality and reduce signal weakness to get better sound effect. Made of high quality plastic, wearable and durable. Easy to install, just use after correct wiring. Suitable for connecting the CD, radio, DVD, host, amplifier, of the original car. Wiring: Gray wire ------ Connect the anode of the host right channel. Gray and black wire ------ Connect the cathode of the host right channel. Yellow wire ------ Connect the anode of the power wire. Black wire ------ Connect the anode of the power wire (earth wire). Brown wire ------ Connect the earth wire when there is noise, unconnect when there is no noise. Blue wire ------ 12V power amplifier control output wire (connected to the power amplifier control wire interface). White wire ------ Connect the anode of the host left channel. Black and white wire ------ Connect the cathode of the host left channel. Specifications: Condition: Brand New Material: Plastic Color: Black Wire: 8pcs wires Package Weight: Approx.45g/1.6oz Package List: 1 * High to Low Audio Converter . Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.