Fotodiox Pro M-400A Studio Monolight with S-Mount Bayonet 7" Reflector - 400 Watt Second (400 W-s) Studio Strobe Flash intensity can be controlled via the soft touch buttons The modeling lamp can be dimmed separately or synchronously with the strobe The strobe has an built-in optical trigger good for a distance of 20m The aluminum cover and equipped induced draft cooling system keeps the body light and at a normal temperature to prolongs the life of the monolight 24-Month Manufacturer Warranty