The Metz 44 AF-1 Flash Unit is designed for Nikon DSLR cameras, featuring a Guide number of 44 for ISO 100/21° and 105 mm for powerful and balanced lighting. This flash gun includes built-in features such as a Diffuser, Swivel, Bounce Card, and Tilt functionality, allowing for versatile lighting options to enhance photography. Please note that this listing is for faulty parts only, indicating that the product may not be in fully working condition and could require repair or replacement of certain components.