The digital display capacitor is an energy storage device, it is designed to supplement audio amplifiers power supply during high current demand. An example of such a demand is when music hits a low bass transient.The overall bass reponse of audio system will be enhanced with using this device. It is capable of storing a large amount of energy whice can be dischargedvery fast when needed. This makes the power cap a logical addition to the audio system as audiomotive batteries are not designed to deliver the current required in high power car audio installations.Another feature of the digital display capacitor is its ability to filter car AC voltage induced by the amplifiers power supply. This can otherwisse cause audible noise in the sound system.We recommend using a capacitor minimum value of 1,000,000 microfarad (1f) for each 500 watts ampliffier power. You can never have too much capacitance for any audio system.The significant feature is the digital display PCB. You can see it on t