.Built-In 2.4GHz X Wireless Radio System..Compatible with Nikon i-TTL.
.Bare-Bulb Design with 360Ws Output..Power, speed, and wireless operation are all benefits of this Portable Flash Kit which here includes a Power Pack so that you have all the essential equipment
needed to go out and start shooting. This setup provides you with a powerful bare-bulb lighting system that can output approximately 450 full-power flashes.