Sound Storm C22 2 Farad Car Capacitor for Energy Storage to Enhance Bass Demand from Audio System Capacitance Tolerance: + / - 10% Working Voltage Range: 16 VDC.Red digital voltage display Surge: 20 V Chrome Plated Posts Mounting Brackets and Hardware Included Dimensions: 10-5 / 16 (H) x 3 (D) 1 Year Warranty