Frequency response: 20Hz-20KHz. Compact design, distortion less than 0. 001%. Low to High impedance amplifier converter. No-noise interference with gold-plated RCA terminal. Simply connect this converter to your vehicles speaker output wires. 2 channel female RCA output that you can easily use to hook up your life. Used for the impedance convert of the added audio amplifier when the car audio has not RCA output. Package included: 1 x Car High to Low Converter