Requirements: It needs an OCF Speedring to operate. The speedring is sold separately Soft Light: The Profoto OCF Softbox 3-Feet Octa creates a soft and flattering light. It is ideal for flattering portraits when used with off-camera flashes Natural Catchlight: The OCF Softbox Octa is perfect for people's photography thanks to its circle-like shape that generates an attractive and natural-looking catchlight in the subjects eye Lightweight and Compact: Constructed from a unique material, they are lightweight and easy to fold and unfold, which makes them very compact and portable to carry in your location lighting bag Compatibility: It is important to note that it is only to be used with Profoto flashes with LED modeling lights. It must not be used with Profoto flashes with halogen modeling light due to its heat resistance