This is a brand new Pyle PLMRCAP18 marine 1.8 farad digital power capacitor which retails for $99.99 plus tax. This waterproof capacitor stores a reservoir of current, while offering low internal resistance allowing it to deliver current when your marine audio system needs it most. Typically, a boat's factory power supply may not be able to generate the power it takes to run an after-market audio system at its top performance. This power cap will deliver that extra torrent of current that your amp needs to maintain consistent voltage during peak demand and is designed for systems pushing up to 1,000 watts. Install it in-line between your battery and amplifier to act as a stabilizer between the amp and your boat's electrical system. It's rated at 20/24 volts and features an LED digital voltage display and polished aluminum finish. Included is a charge bulb, clear mounting brackets and installation hardware. Complete with a full warranty and our exclusive 30 day money back guarantee.