The PROMASTER 100SL for Fuji X sports a full complement of advanced features in a small form factor. Its hybrid design gives you the option of an LED light for videos or flash for still photos. The 100SL is well-balanced so it 'just feels right' on your camera while throwing a flattering quality of light towards your subject. A built-in USB port is useful for future firmware upgrades. The 100SL for Fuji X can also be used as a wireless manual slave flash.