Minimizes or eliminates alternator noise and whine by doubling the capacitance level of the existing filtering. Aircraft electronic systems such as intercom systems, audio panels, Nav/Coms, VHF/UHF transceivers, GPS, DC peripherals, etc are greatly benefited. Operating Voltage: 50 VDC. Size: 1″x1.875″ FAA-PMA approved. By Lonestar Aviation.