The Godox SK400 studio flash is a powerful lighting tool designed for professional photographers. It features a maximum power output of 400Ws, a fast recycling time of 0.1-1.0 seconds, and a flash duration of 1/2000 to 1/800 second. The flash also has a built-in 2.4G wireless system for remote control and triggering, a Bowens mount for attaching light modifiers, and a durable metal housing for long-lasting use.