The TS420 Emergency Power Supply simultaneously provides one primary power output & three lighting power outputs. Pitot/Static ports or optional electrical input provides the ability to work in automatic mode without pilot intervention. Provides 18 volts of rechargeable power for Mid-Continent products, lighting or critical avionics. Powers LED or incandescent lighting at 5, 14 or 28 VDC. Utilizes sealed lead-acid cells for reliability & cold-weather performance. Quality Mil-Spec connectors included & Two-year limited warranty.