BOSS Audio CAP8 - 8 Farad Car Capacitor For Energy Storage To Enhance Bass Demand From Audio System 3 Digit Super Bright Blue Digital LED Voltage Display Audible Warning Tone for Reverse Polarity, Voltage Overload and Low Battery Voltage.8 Farads with digital voltage display Voltage Measurement Accurate to + / - 0.1 VDC Automatic Sleep Status When Volume Is Low Or There Is No Voltage Variation Present Capacitance: 8,000,000, Working Voltage: 16 VDC, Surge Voltage: 24 VDC Equivalent Series Resistance: 0.015 Ohm @ 100 Hz / 25C, Capacitance Tolerance: + / - 10% Dimensions: 9 x 6 x 2, Unit Weight: 5.3 Lbs 1 Year Warranty