Power on-the-go. Lighter adapters compatible with all Pump In Style®models. When traveling by car, this adapter provides an added convenience by powering the breastpumps by simply plugging into the vehicle's lighter outlet. Powers Medela Pump in Style breastpumps. Plugs into the standard Vehicle Lighter outlet. Powers Medela 9-volt Pump In Style Breastpumps (2008 versions -57027, 57062, 57036 of PNSA only).