The x2 Canon 580EX / 580EX II Speedlite is a Shoe Mount flash unit designed for Canon cameras, offering a guide number of 100ft./Iso 100 and lens coverage of 24mm-105mm. With a hot shoe mount interface, this flash unit provides manual power control levels ranging from 1/128 to 1/1, with features such as AF illuminator, flash exposure bracketing, slave function, and wireless off-camera control. The Speedlite 580EX also offers automatic and manual zoom capabilities, along with E-TTL and AF assist light support for versatile lighting setups. This unit is lightweight at 13.23 oz and compact with dimensions of 5.28in height, 2.99in width, and 4.49in depth. Built in Japan, the Canon Speedlite 580EX is a reliable and high-quality flash accessory for photographers.