This Hensel Integra Pro 500 kit includes 3 flash units that are AC-powered and portable. The kit also comes with a wireless Pocket Wizard kit which includes a hot shoe transmitter (for mounting to the camera) and 3 receivers (attached to the strobe units via cables, also included) for easy use. The flash heads have a 2 pin tube fitting, a modeling light and are part of the Hensel Integra series. This flash lighting kit also includes 3 stands, 2 umbrellas, a soft box all packed into a branded case with wheels and is perfect for professional photographers looking for reliable and efficient lighting.