The Westcott FJ ProMax AC/DC Battery & Power Adapter is the perfect companion for your FJ800 and FJ400 II strobes. This versatile power solution allows you to seamlessly switch between AC and DC power, ensuring you never miss a shot. With a robust design, it provides reliable performance whether you're in the studio or on location. The adapter features a compact, lightweight build for easy transport, making it ideal for photographers on the go. Enjoy uninterrupted shooting sessions and consistent lighting with this essential accessory for your lighting setup!