Genuine Rockford accessories,

RFC10HB
10 Farad Digital Capacitor
Low ESR (Equivalent Series Resistance)
carbon/electrolytic capacitor,
blue voltage/amp meter,
3 power inputs and 3 ground inputs

RFC2D
2 Farad Digital Capacitor
Low ESR (Equivalent Series Resistance)
16 - 20 volt peaks, blue voltage meter
2 power inputs and 2 ground inputs

RFC1D
1 Farad Digital Capacitor
Low ESR (Equivalent Series Resistance),
16 - 20 volt peaks, blue voltage meter,
2 power inputs and 2 ground inputs

RFC1
1 Farad Capacitor
Low ESR (Equivalent Series Resistance)
16 - 20 volt peaks
1 power and 1 ground input