ITEM NAME:Frequency Transmit Speaker Amplifier Car Audio Radio Vehicle Impedance Converter Car High to Low Impedance Converter Speaker Output to 2Channel RCA Line Control Features: -100% brand new and high quality -For&;nbsp; host (cassette player / card machine / CD / VCD / DVD, etc.)without low-frequency () output -It will be the speaker frequency output is converted to low-frequency () output to the car amplifier or subwoofer. - Simply connect this converter to your vehicle's speaker output wires. &;nbsp; Specifications: Item type:&;nbsp;&;nbsp;Impedance Converter Color: As the picture show Applicable models: GM Supply Voltage :12 (V) Function: Transfer frequency high to low Size: 90*40*27mm/ 2.7’’*1.2’’*0.8’’ (L*W*H) Transparent plastic paper length: 125*70*30mm/3.7’’*2.1’’*0.9’’ (L*W*H) &;nbsp; Package Included: 1 X&;nbsp;Car Impedance Converter.It will be the speaker frequency output is converted to low-frequency () output to the car amplifier or subwoofer. Item type:&;nbsp;&;nbsp;Impedance Converter. - Simply connect this converter to your vehicle's speaker output wires.