The HUB remote for Canon mounts onto your camera's hot shoe to provide wireless firing. When your camera shutter is pressed, the HUB will simultaneously send the firing signal to all of the flash units in your setup that are fitted with CyberSync™ receivers or transceivers. Simply match the frequencies across all components and you’re ready to shoot! The HUB is the only remote in our line that provides HSS and TTL (coming soon) capabilities when used in conjunction with the LINK800WS flash unit. The HUB is also the only remote capable of connecting our flash units to our Paul C. Buff, Inc. App (available soon on iOS and Android).