This is a Canon EF 70-200mm f/4 L USM lens, which comes boxed with a hood and pouch. It is compatible with Canon cameras, and has a maximum aperture of f/4. This lens is perfect for telephoto shots, and has both auto and manual focus capabilities. It is part of the Canon "L" series and has a mount for Canon EF. 

The lens is in great working condition, and has been used before. The brand is Canon and the focal length is 70-200mm. If you are looking for a high-quality lens for your Canon camera, this is a great option.