Stinger SPC505 Pro Hybrid 5 Farad Capacitor 16V -18V surge, For systems up to 1000 Watts, 5 Farads, Louder & clearer bass response, Monitor system voltage Stabilizes battery voltage, Minimizes headlight dimming, Similar to a battery/capacitor combo Bright 4 segment red LED display, Accepts (2) 1/0ga or 4ga inputs / outputs or combination of (1) each Unique industrial styling, Louder and cleaner bass response