This is the Canon Speedlite "580EX II," a genuine Canon product. It's a high-performance external flash, suitable for a wide range of applications including portraits, product photography, and event photography. 【Main Specifications】 Guide Number: GN58 (at ISO100 and 105mm) Compatible TTL: E-TTL / E-TTL II Zoom Range: 24–105mm (14mm with wide panel) Flash Modes: Auto / Manual / Multi-flash Slave function (wireless flash) Bounce flash compatible (vertical 90° / horizontal 180°) 【Condition】 Used item. Power and flash function confirmed. There are signs of use and scratches on the exterior, but there are no operational issues. Body only