BOSS CPBK2 2.0 FARAD LED Digital Car Capacitor Cap + 4 Gauge Amp Install Kit Equivalent Series Resistance (ESR): 0.00195 Ohms @ 120 Hz @ 25 Degrees C Low Level Input Voltage: 20 Volts Remote Terminal Screw Capacitance: 2 Farad, 2000000 Microfarad High Level Input Voltage: 24