Features 4-channel audio high to low, fast heat dissipation, anti-interference, strong shielding, can isolate some noise, high fidelity Standard connector, equipped with 15CM dedicated line, to avoid current noise interference caused by disorderly wiring Converts loudspeaker output high frequency to low frequency (RCA) output, connects to car power amplifier or subwoofer signal input Delay switch line output reduces impact on power amplifier or subwoofer, eliminating current interference when the host is turned on Designed for audio hosts without low frequency (RCA) output, such as cassette player, card player, CD, VCD, DVD, etc. Specification Item Type: Audio Converter Material: Plastic Voltage: 12V Maximum Power: 50W Channel: 4 CH Size (W x L x T): Approx. 80 x 90 x 30mm / 3.1 x 3.5 x 1.2in How to Use Connect the power cable to the converter wire harness and connect to the car main engine; connect the two car audio cables to the car audio amplifier Product packaging includes complete wiring instructions and usage methods Wiring White line - rear left speaker- Gray line - rear right speaker+ Gray black line - rear right speaker- White black line - rear left speaker- Green black line - front left speaker- Blue line - front right speaker+ Green line - front left speaker+ Blue black line - front right speaker- Red line +12V (ACC) Black wire - connect to negative ground Yellow line - power amplifier REM position Package List 1 x Audio Converter 1 x Power Cable 1 x Manual